I just got my iphone !! finally.. it was stuck at customs for over 2 weeks... anyways i bought it on ebay for 550 (pretty good deal since i live in canada and cant get em here).. works great.. my sim card works.. most amazing phone ive ever seen.. you can do anything with this phone..
it has this installer thing.. you can basically install anything on it.. it has all the download options within the phone and you can just download and install games,applications, whatever.. ive been messing around with it all day and i still havent figured out all the featuers... so many of them...
like the previous guy said.. make sure if you buy one it is firmware 1.1.1 and unlocked.. or it wont work

.. there are still plenty on ebay taht will work anywhere.