300? for 350 you could get a Peg2 and use your voodoo card in that!, (ok enough of that)
A2000 was probably the best amiga model if you take quality, and timeframe into account, Commodore didnt build an A4000 with nearly the same quality they did the A2000, the 2000's are my favorite Amiga for that reason, built good quality and many upgrades! although not as functional as a A1200 or A4000 but NONE of these systems are very functional by todays standerds...so why bother spending a fortune on one?
I grew up on an A1200 so I'm sentimental to that model somewhat, but really? A2000 with a GVP Spectrum and an 030 is fine to toy around with.
I agree with DoomMaster pretty much, A2500 for 200.00 off ebay is a fine little system to play with.