The only iPhone I've paid for out of pocket was my first one. I've always been able to sell my old phones for more than I paid for the new one.
2011 Sapphire Black/Black E70 X5 M "Torquegasm"
2010 Jerez Black/Black E90 M3 DCT -Gone-
2009 Montego Blue/Grey E90 335i -Gone-