I am buying a P80; what would be a good cheap, available amplifier unit to get to play it through?

If you get a cheap amp - it won't sound it's best, but if you MUST, at least get an amp made for keys or vocals.(full range requires a horn - no guitar amps or bass amps)
Try this:
Peavey KB30a - it's small powerful and reasonable.


------------------
Uncle Dave