**Ortek Technology MCK-101FX**not exactly "cheap":

https://www.ebay.de/itm/29-Jahre-alte-R ... :rk:1:pf:0

**Siemens ZBE 3975**:

https://www.ebay.de/itm/Siemens-ZBE-397 ... 0005.m1851

Just for the keycaps:

https://www.ebay.de/itm/Cherry-Tastatur ... :rk:3:pf:0

**Dell AT**:

https://www.ebay.de/itm/Mechanische-PS- ... rk:34:pf:0

Nice and expensive:

https://www.ebay.de/itm/Apple-Macintosh ... rk:58:pf:0