You just can't buy an accelerator for an amiga below 100 $. That's just wishful thinking.
A2630 or 2630 are pretty low end accelerators though, so around 100$ should be the right price. GVP 030's should be 100$-200$ (depending on how much RAM they have on) and 040-060 should be above 200$-300$ mark (AMIX won't run on 040-060 though AFAIK, so beware)
