Keychron K1 mechanical keyboard (with blue switches): $6 : r/ThriftStoreHauls
Amazon.com: Keychron K1 Pro QMK/VIA Ultra-Slim Wireless Bluetooth/Wired USB Custom Mechanical Keyboard for Mac Windows Linux, TKL Layout Double-Shot PBT Keycaps White LED Backlit Low-Profile Gateron Brown Switch : Video Games
Amazon.com: Keychron K1 SE, 87 Keys Ultra-Slim Wireless Bluetooth/USB Wired Mechanical Keyboard with RGB LED Backlit, Low-Profile Gateron Mechanical Brown Switch Compatible with Mac Windows : Video Games
Keychron K1 V4 review: A sleek, low-profile mechanical keyboard for Macs | iMore
Keychron K1 Review. Personally I love the feel of a good… | by Jigz | Medium
Keychron K1: Main Discussion
Keychron K1 review: the wireless keyboard Apple should have made - General Discussion Discussions on AppleInsider Forums
Amazon.com: Keychron Q1 Wired Custom Mechanical Keyboard Knob Version, 75% Layout QMK/VIA Programmable with Hot-swappable Gateron G Pro Red Switch Double Gasket Compatible with Mac Windows Linux (Black)-Version 2 : Video Games