Need recommendation for power amp under $250

I know it's a small budget round' these parts.

I'm looking for a power amp that is extremely natural and clean. I don't need much power as I am driving pretty efficient (90db) speakers, usually at modest listening levels.

I have a fairly good grasp on integrated amps, but power amps seem to have quite a few names I know nothing about.

So, I'm looking for something used under $250... sort of a 'best bang for my buck' thing.

Thanks.