42S for $28USD

[Dave Britten]

You might luck out like I did with my really cheap 32S with manual. It was listed as non-working, and arrived as advertised, but it turned out to be nothing more than a stuck/inverted key dome. A couple minutes with an x-acto knife to make a tiny incision releasing the pressure, and it was right as rain. The 1 key feels a tiny bit softer than the rest now, but it never sticks or misses.