IPhones hold their trade-in value better than most aging electronics. NextWorth pays an average of $200 for a 16 GB iPhone 3GS in good condition.
That’s also what a brand-new 16 GB iPhone 4 costs — but only with the subsidy AT&T offers to buyers who take out a new, two-year service contract. Buy an iPhone 4 without the contract, and you’ll pay $599 for that 16 GB phone.
If iPhone owners break or lose their phones before their contract is up, they need to buy a new, unsubsidized one if they …