After a long hiatus in Android land, a week ago I picked up another N900. Beaten up, scratched, no accessories, but USB port and everything else working. I'm loving it. $120

And today I just bought another N900. MINT condition, not even a scratch, with all accessories, and obviously everything working. $150

So is it worth buying? I think so, you just have to be careful what you buy, and test it out.