Target is expanding its trade-in program through NextWorth (, which specializes in consumer electronics upgrades and trade-ins, to offer a price lock guarantee for iPhone trade-ins to 1,470 retail locations nationwide.

Customers can go to a nearby Target store to lock in a trade-in value for their old iPhone model and receive the quoted value when they pick up their new iPhone 4S starting on Friday, Oct. 14. This is the first time Target has locked in trade-in values prior to product availability. Trade-in values are based on used iPhones in good working order, rather than phones in excellent or flawless condition, as follows:

° iPhone 4 (16GB & 32GB): US$200;

° iPhone 3GS (32GB): $120;

° iPhone 3GS (16GB): $110;

° iPhone 3GS (8GB): $101.

In addition to essentially providing a free iPhone 4S upgrade, in-store trade-ins provide instant gratification to those looking to trade up to the new iPhone. Rather than mailing their old phone and waiting for a check, customers can keep their phone until they pick up the new iPhone 4S and still receive the value they were previously quoted. Customers pre-ordering an iPhone 4S at Target stores this week will also get priority allocation when new phones become available on Friday.