Verizon iPhone Trade-In Not Worth Jumping At

Verizon is allowing some AT&T customers to trade in their iPhones for credit when they buy a new Verizon iPhone 4 and sign up for a two-year contract, although the trade-in value isn't as much as they'd get by selling their old phones on the secondary market.

A quick glance at Gazelle.com, where used iPhones hit a premium price on Jan. 12 after the announcement that Verizon was selling iPhones, showed on Thursday night that various iPhones in excellent condition could be sold on Gazelle for $15 to $80 more than what Verizon is offering in credit toward a new phone.