I am looking for a used N900 around high $300s or so.

Maybe it would help to attach pictures / youtube video. I had a tough time returning a fake N95 replica way back when N95s were the craze.

For people with old phones FYI:

Go to http://www.nokiausa.com/find-products/trade-up, add the promo code "earthday50" on the Trade Confirmation screen. NOTE: your old phone may not be worth anything and will only show 'tree planted' for its value. However, you will still get the $50 after the promo code is entered.

You'll need to send a copy of the receipt with your old trade-in phone.

Depending on the old phone you send in, you may even get more than $50 back!