For the small amount of games that are enhanced with an accelerator, it's really not worth shelling out so much money for an accelerator when you can just run those few games through UAE much faster anyway. An 8MB RAM expansion is all you need really unless you intend on actually taking advantage of the OS as well, not just playing games. And if you're thinking about getting an accelerator and getting into AmigaOS, you may as well get yourself an Indivision so you can take advantage of those higher resolution screenmodes and cheap VGA monitors.
I just think shelling out hundreds of bucks for an accelerator just so you can play an old 3D game once or twice is wasting it, when you'll be bidding against plenty of other guys who need that accelerator to run their serious Amiga apps (or more importantly, to develop new Amiga software).
