The K2 followed Keychron's low-profile K1 onto Kickstarter in April 2019, this time with full-height switches. It's an 84-key, 75% board with a Mac-style media row, keycaps for both macOS and Windows in the box, and a 4000 mAh battery Keychron billed as the largest seen in a mechanical keyboard. It pairs with three devices over Bluetooth and runs wired over USB-C. Version 2 is the one you'll find most, with Bluetooth 5.1 and a long run of switch options. There were soldered Gateron G Pro boards, a hot-swappable model whose sockets take most 3- and 5-pin MX switches, later Keychron Super switches, and non-backlit boards with Keychron's own switches, each in a plastic or aluminum frame. Stock keycaps are ABS, and Keychron itself says they'll go greasy with use. A Version 3 arrived in 2025 with QMK, Bluetooth 5.2 and double-shot PBT caps. The K2 Pro, K2 Max and K2 HE are separate keyboards.
SwitchesGateronOther MX-style switches
Versions
Keychron publishes separate firmware for K2 Version 1 and Version 2. Version 2 boards were sold with soldered Gateron G Pro switches, as a hot-swappable model with Gateron G Pro switches that takes most 3- and 5-pin MX switches, and later with Keychron Super switches. Non-backlit boards used Keychron's own mechanical switches. Each came with a plastic or aluminum frame. Version 3 (2025) adds QMK, Bluetooth 5.2 and double-shot PBT keycaps. The K2 Pro, K2 Max, K2 HE and K2 Ultra 8K are different boards.
The stock ABS keycaps go greasy and shiny, which Keychron calls normal wear. Keychron's support also lists a squeaky left Shift, where the stabilizer seat rubs the aluminum plate, and flashing the wrong firmware file can leave a K2 dead.
New to used keyboards? How to check a used keyboard covers chatter, stabilizers, keycap shine and the rest in detail.
Buying guide
We'd buy the K2 titled works at $49 delivered from a 99.1% seller, or the Version 3 with Keychron Super Brown switches and PBT caps at $49 with free shipping, since Version 3 adds QMK and caps that won't go shiny. There are at least 111 for sale and most complete used boards ask $50–80 delivered, while Japan dealers ask $142–204, often for JIS boards with a short space bar and Japanese legends. The K2 came both soldered and hot-swap, so believe hot-swap only when the title says it, because a chattering switch on a soldered board is a desoldering job. Ask how many days a charge lasts with the backlight off (Keychron rates it up to 240 hours), for a keyboardtester.com video with every key, and for a photo of the space bar and home row under light, since the stock ABS caps go shiny. Make sure the USB-C cable comes with it, since one board here is titled without it, and skip zero-feedback sellers.
$41.63est. delivered
The lowest delivered complete K2, a K2C3 titled used at $42 delivered from a 100% seller. It isn't titled tested, so ask for a typing test video and how long a charge lasts.
Keychron K2 K2C3 Wireless Mechanical Keyboard 75% RGB Bluetooth USB-C Used
$49.00delivered
Titled Version 3, with Keychron Super Brown switches and PBT caps, at $49 with free shipping from a 100% seller. That's the K2 with QMK and matte caps for the price of an older one, so ask for a typing test and battery runtime.
Keychron K2 V3 75% Wireless Mechanical Keyboard QMK Super Brown PBT Keycaps
$48.78est. delivered
The only US K2 here titled as working, a K2B2 at $49 delivered from a 99.1% seller. Ask how long the battery lasts, since a working board can still have a tired one.
Keychron K2B2 Wireless Mechanical Keyboard RGB Backlight - WORKS!
$27.50est. delivered
A K2C3 listed for parts or repair at $28 delivered, with no fault given. Working boards start at $42, so it only makes sense for the caps in the photo or a repair you're sure of.
Keychron K2 K2C3 Wireless Mechanical Keyboard Bluetooth RGB For Parts or Repair
Delivered prices include shipping as eBay quoted it to a US address on Oct 14, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Snapshot
Checked . Some may have sold.
Delivered prices include shipping as eBay quoted it to a US address on Oct 14, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Used$41.63est. delivered
$32.99 + $8.64 shipping
Buy It Now$32.99
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Good buy
K2C3, titled used. Switches not named.
Seller: cartsmgarts
100% positive
Used$49.00delivered
$49.00 · free shipping
Buy It Now$49.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Good buy
Titled Version 3 with Super Brown switches and PBT caps. Free shipping.
Seller: zyvoris
100% positive
Used$48.78est. delivered
$31.05 + $17.73 shipping
Buy It Now$31.05
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Good buy
K2B2, titled works.
Seller: mixmasterkm
99.1% positive
For parts$27.50est. delivered
$15.00 + $12.50 shipping
Buy It Now$15.00
Project piece
For parts or repair, no fault stated. Photo shows aftermarket caps.
Seller: matthewtrotz
100% positive
Used$61.10est. delivered
$54.99 + $6.11 shipping
Buy It Now$54.99
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Our take
Blue switches, titled hot-swappable.
Seller: wicky_101
100% positive
Used$64.00delivered
$64.00 · free shipping
Buy It Now$64.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Our take
Titled no dongle or cable. The K2 pairs over Bluetooth, so you only need a USB-C cable.
Seller: goodworlddeals
99.8% positive
Used$57.52est. delivered
$50.00 + $7.52 shipping
Buy It Now$50.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Check the seller
Bare title, zero-feedback seller. Check feedback on the item page.
Seller: chbou631
No feedback yet
Used$204.46est. delivered
$136.46 + $68.00 shipping
Buy It Now$136.46
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Priced high
JIS layout, titled tested, from Japan with $68 shipping. About 3.4 times the median.
Seller: jamazon77
99.4% positive
Prices change daily. The live eBay search shows everything listed now, including anything new since Oct 14, 2026.
See every listing on eBay ↗eBay searchKeychron · Gateron, Optical + 1 more
2020
$45–$85 typical ask
Keychron · Gateron, Optical + 1 more
2020
$50–$100 typical ask
Keychron · Keychron K Pro
2022
$55–$120 typical ask
Keychron · Keychron K Pro
2023
$160–$340 typical ask