Amazon.com: Gugxiom 12 Key Macro Pad with Knob, Green Axis Macro Mechanical Keyboard with 50 Million Keystroke Life, Multifunction DIY Programmable Keypad for Office Games etc.(Black) : Electronics
ISO50 -- an ISO-inspired 50% keyboard - deskthority
The NCKB 50% keyboard (details in comments) : r/MechanicalKeyboards
Amazon.com: Camiysn Mechanical Gaming Keyboard, Wired Compact Gaming Keyboard with Number Pad Red Switches LED Blue Backlit Keyboard 100 Keys for Windows Mac PC Laptop : Video Games
The Best Gaming Keyboards under $50
SA-50 | White and Green Mini Keyboard for kids | CASIO
DNA59 50% Kit Custom Mechanical Keyboard Kit PCB CASE hot swappable sw – KPrepublic