MAX Falcon-8. $50 assembled, $40 DIY (some soldering, but easy). Add a few dollars more for switches and you provide the keycaps. 8 programmable keys. I wouldn'

MAX Falcon-8. $50 assembled, $40 DIY (some soldering, but easy). Add a few dollars more for switches and you provide the keycaps. 8 programmable keys. I wouldn't call it cheap but it's definitely cheaper than the author's option. I got one somewhere; it is nice but I don't really use it much nowadays.