Cheap Model M, just needs a clean:

[jacethesaltsculptor]

https://www.ebay.com/itm/1992-IBM-Model-M-1391401-Clicky-Keyboard-with-Cable-Works-Drink-Spill/333495024067?hash=item4da5da39c3:g:kt4AAOSw6DxeLeq3

I'd almost be willing to bet money, that a swab of iso alcohol on a Qtip would get those sticky keys going again, and if so you'd have a very cheap model M on your hands.

[fohat.digs]

I think it will take a complete dis-assembly (requiring a bolt mod to get it back together) because the 3 membranes are probably going to need a good soak to get rid of the dried sugar-water that is probably encrusted on and between them.