Why not a N9? Anyway, have you tried to announce on eBay?
Honestly your best bet is to sell your iPhone (craigslist?) and use the money to buy an N900.. I have both N900 and N9 and there's no way I would sell those, and if people were like me here then ur best bet would be what I mentioned above. Good luck.
I want to trade! Btw. I'm in Las Vegas, my profile shows my old address. Just want to know if its CDMA or GSM! I'm assuming its GSM as its AT&T (but somewhere I read that they have CDMA too, not sure if its true). Edit: Just changed my profile address!
I do have a N900 laying over here too if you like to trade