trade in

That's nearly $45 more than the current trade-in value for a 16GB model.

Trade-in programs typically also pledge to wipe your device of data.

A nearly 2-year-old 16GB iPhone 4S currently fetches as much as $230 in some trade-in programs (see chart below).

The appeal of the trade-in is clear once you look at the numbers.

Many trade-in programs also value phones differently by carrier and even color.