Mine wasnt quite free, but cheap regardless.
-$130 AT&T ETF
+250 Iphone 3gs 16gb
-200 Evo 4g...
I coulda got 300 for my iPhone i think but there were like 10 others locally for 300 so i just undercut them so it would sell quick, 50 bucks isnt worth the hassle of getting stuck with the phone...