Recommended: iPhone 4 trade-in prices start to drop

Before the iPhone 4S was announced, Gazelle.com was offering $225 for a 16 GB iPhone 4 ATT model in “flawless” condition; now the price is $200. Considering trading in your iPhone 4? You’ll still do well, but prices for the phone have dropped since the new iPhone 4S was unveiled last week. NextWorth, which had …