Let me start this off by telling you that this is no typo - the minus before the 50$ is intentional.
The folks at Amazon’s do it yet again: people willing to bind themselves into a 24mo AT&T contract can get the Pantech Duo(picturted below) for free after carrier subsidies - and additionally benefit from a 50$ mail-in rebate:
The Pantech Duo is a Windows Mobile 6 smartphone with a 416MhZ CPU and 64MB of RAM - CNET’s reviewers rated it decently, altough they were a bit concerned with the “manufacturing quality”…
P.S. The device’s list price is 249$.