Korg DSS-1 by sounddoctorin
One of the greatest sounding vintage sampling keyboards. They can be gotten for a few hundred usually. Have it upgraded and you can store samples on sdcards etc. instead of dealing with slow floppy storage. Patches are available off my sounddoctorin.com/synthtec/synth.htm links unless someone kills the links. Wide variety of sounds but learn to use it and make your own! Fairly detailed standard subtractive synth parameters with keyboard dynamics.3000 dollars in 1986 when I first saw it.