Hit your local classifieds. I bought 4 used N900s over the past year in various stages of wear. I now have one mint, two used and one completely broken N900 for spares for a total cost of $280. Funny part is I only have one OEM charger and two batteries between all of them.

So keep looking, and definitely stay away from the new ones on Ebay. At this point real nee N900s are as rare as pink unicorns.