Retail Price: 509
Tax: 42
Total cost of Phone: 551

Selling for: 500

See:

http://www.att.com/shop/wireless/devices/samsung/galaxy-s-4-16gb-black-mist.html#fbid=424sc1AqIEk

Reason for selling: Broke my previous phone, got this back from an insurance claim but decided to switch to iPhone.