Antminer S19 Sales & Free ASIC Mining Tools
Refurbished & tested Bitmain Antminer S19 miners, firmware optimization, and immersion mining solutions.

Free Bitcoin miner monitoring software included — track hashrate, temps, and alerts across your entire farm.

Partners of ING Mining™

Compass
Mining

BlockOps
Mining

Halo
Mining

Efficiency Rate

95 %

Items Sold

10.2 K

Active Miners Deployed

100 +

RigAlert™ by ING Mining

Free Bitcoin ASIC Miner Monitor & Alert Software for Windows.

Monitor hashrate, temperatures, fan RPM, chain faults, and offline miners with fast network scanning. Auto-fills default miner passwords and sends scheduled Gmail alerts. Designed for real ASIC mining operations.
⬇ Download RigAlert™ — Free for Windows
Free download · Windows 10/11 · No install required · by ING Mining

ING eBay AutoLister™

Free AI-Powered eBay Listing Software

Upload a photo or paste a product URL and let AI write the title, description, and item specifics — then publish straight to eBay. Built by the same team behind ING Mining.
⬇ Download Free Visit inglisting.com
Free download · Windows 10/11 · No install required · by ING Mining

Unlock Your Crypto Earning Potential: Maximize Your Returns with ING Mining™

ING MINING^™ is a registered U.S. trademark — verify our registration here.

Best Sellers

Explore our collection of ASIC miners for sale, including the powerful Antminer S19 series. Each miner is tested for quality and optimized for maximum mining efficiency.

Bitmain Antminer S19 110TH/s – SHA-256 Bitcoin Miner – FireSale

Bitmain Antminer S19 XP 141TH/s SHA-256 Bitcoin ASIC Miner – BraiinSOS – 155TH/s

Antminer S19 95TH/s ASIC – Boost to 105TH/s (Braiins OS) – Refurbished

Why ASIC Miners Beat Everything Else for Bitcoin

An ASIC miner does one job: compute SHA-256 hashes as fast and as cheaply as possible. That single-mindedness is the whole advantage. A GPU rig can be repurposed for gaming or rendering; an Application-Specific Integrated Circuit can’t do anything else — and that’s exactly why it mines circles around general-purpose hardware. A modern Antminer S19 runs somewhere around 30 joules per terahash; a GPU farm chasing the same hashrate would burn several times that in electricity alone.

That efficiency gap compounds fast. At today’s difficulty, the difference between an efficient rig and an outdated one isn’t a rounding error — it’s the difference between mining at a profit and mining at a loss once the power bill arrives. It’s why serious operations, from single-rig hobbyists to multi-megawatt data centers, standardized on ASICs years ago and never looked back.

We’re not a marketplace reselling whatever comes through the door. Every miner that leaves our shop gets benchmarked, stress-tested, and — where it makes sense — updated to Braiins OS before it ships. Weighing your first rig or your fiftieth? Talk to us — we’ll tell you honestly whether a given miner fits your setup, not just try to close a sale.

What “Refurbished” Actually Means Here

A lot of listings say “refurbished” and mean “it powered on once.” That’s not how we do it. Every Antminer that comes through ING Mining gets run under load, checked chain-by-chain for hashboard faults, and cleaned before it’s listed — not after a complaint. If a miner is short a chip or running hot, we say so in the listing and price it accordingly. We’d rather lose a sale than lose your trust.

That matters more than it sounds like. A single bad hashboard on a used S19 can quietly cut 30–40% of its hashrate without ever throwing an obvious error — you’d just wonder why your daily payout looks thin. Buying from a seller who actually benchmarks real output before shipping, instead of after your Bitcoin is already gone, is the difference between a good deal and an expensive mistake.

We’re a small, family-run operation — not a drop-shipping storefront — which means the person answering your questions is the same person who tested your miner. If something’s wrong after it arrives, you’re not stuck in a support queue arguing with a script.

Benefits of Our Hardware

Increased Mining Efficiency

Every rig we sell has been run under real load before it’s listed — not just powered on and photographed. That’s the only way to actually know a miner’s true hashrate and thermal behavior instead of guessing from a spec sheet.
Cooling is where most home setups quietly lose performance. We test and, where needed, recommend airflow improvements so your miner keeps its rated hashrate instead of throttling on a hot afternoon.
New to mining? Our setup guidance covers pool configuration, firmware, and monitoring — the stuff that trips up most first-time buyers in week one.

Higher Hash Rates

Hashrate is the one number that actually determines your share of block rewards — everything else is secondary. We benchmark every miner’s real output, not just the number printed on the box.
A faster miner solves more hashes per second, which is the entire game in a difficulty-adjusting network where everyone else is racing too.
Whether you’re running one Bitcoin miner in a garage or fifty in a warehouse, the math is the same: more real hashrate per watt means a shorter path to profitability.

Energy-Efficient Designs

Power is the biggest recurring cost in mining — bigger than the miner itself over its lifetime. We prioritize hardware and firmware tuning that gets more terahash out of every watt, because that’s what actually moves your break-even date.
It’s not just about the electric bill. The International Energy Agency has flagged mining efficiency as a real factor in the industry’s environmental footprint — running efficient hardware is one lever every miner can pull individually.
Efficient doesn’t mean underpowered. Our tuned rigs hold strong hashrates while drawing less than their stock configuration — that’s the actual definition of a good upgrade.

Built for Volatile Markets

Bitcoin’s price swings; your hardware costs don’t have to. A miner that’s efficient at today’s difficulty stays profitable longer as difficulty rises — buying cheap, inefficient hardware just means replacing it sooner.
Network data shows mining difficulty has trended upward for most of Bitcoin’s history. Hardware that’s efficient today is your buffer against that trend tomorrow.
We’d rather sell you one miner that keeps earning for two years than three miners you’ll replace in six months.

Real Support From People Who Actually Know Mining

Every miner we sell was tested by someone who understands what “chain fault” or “abnormal temp” actually means — not a call-center script reading from a troubleshooting flowchart.
We’re a small, family-run operation, which means when you email us, you’re talking to the people who source, test, and ship the hardware — not a support ticket queue.
Questions before you buy are welcome, not an inconvenience. If a miner isn’t a good fit for your setup, we’ll tell you — read more about how we operate on our About page.

Firmware Tuning: The Free Upgrade Most Buyers Skip

Stock firmware leaves performance on the table. We flash eligible miners with Braiins OS, which lets us push more terahash out of the same power draw — often a meaningful jump in output without touching the electric bill. It used to be a DIY project involving a lot of trial, error, and the occasional bricked board; we handle it before the miner ever ships.

Every rig we sell is built to run 24/7, not just survive a weekend of testing. That means real airflow planning, hashboard-level diagnostics, and — for buyers running larger deployments — guidance on immersion cooling if air alone won’t cut it at your site.

Buy from ING MINING™ and you get a miner that’s already been optimized — not one you have to optimize yourself after the fact.

Why choose Ing Mining

We’re not the biggest name in Bitcoin mining hardware — we’re a family-run shop that tests every miner personally before it ships, and we’d rather earn a long-term customer than close a quick sale.

Every Miner Bench-Tested

Real Human Support

Full Condition Transparency

Fast, Insured Shipping

Honest, Fair Pricing

Our Testimonials

Hear directly from customers running ING Mining hardware in their own operations — from single rigs to full mining farms.

As described, up and running with autotune at 110-115Th/s. Thanks. Seller answers questions for operations like great customer support!

Chrisbuch_10Antminer S19 110THs

The seller was very authentic toward the buyer and showed generous concern regarding the transactions. For that reason, I, as a buyer, will continue to support this seller for the professionalism and transparency that he has shown.

Peter KvandeGoldshell 4-Box 1200W

Great seller! Great communication A+++ Item arrived fast and safe to the UK! Very Very Good Seller!!!

BarryAntminer S19 110THs

Excellent seller, Item as described, Item work perfect. Very good communication, and custom letter too. Very appreciated.

Adrian EavesNew Antminer S19

Item is as described, well packaged, shipped promptly, and arrived sooner than anticipated without any issues, thank you so much! I recommended this seller !!!

Walter Rowe Antminer S21 234TH/s

Seller was patient with me as a new user of bidding features and my delayed payment. Fast shipping. I haven’t had the opportunity to power on the board yet, but physical inspection displays excellent condition. Fast shipping, well packaged. Will purchase with seller again.

DavebillAntminer S19 95Th/s

Ai Pictures by Nick Squires

Explore Nick Squires’ groundbreaking AI art collection focused on Bitcoin. His work brilliantly fuses technology with artistic vision, showcasing the dynamic world of cryptocurrency through digital masterpieces. Immerse yourself in a visually stunning journey that celebrates the essence of Bitcoin, inviting viewers into the heart of innovation.

Blog Posts

Stay updated with the latest trends, tips, and strategies in cryptocurrency mining. Learn how to maximize profits and choose the best ASIC miners for your needs.

Request a Free Consultation

Have questions about ASIC miners for sale? Contact us today and get expert advice on choosing the right mining hardware for your needs.

Antminer S19 Sales & Free ASIC Mining Tools Refurbished & tested Bitmain Antminer S19 miners, firmware optimization, and immersion mining solutions. Free Bitcoin miner monitoring software included — track hashrate, temps, and alerts across your entire farm.