If you have had items taken by customs, there are a few different steps that you can take. If you believe that your goods were seized wrongfully or that customs had no legal right to take the items in question, you have 5 days to challenge the decision after receiving your Notice of Seizure. Your reasoning can be that the items were not in fact prohibited or restricted for importation, the goods were to be given away and not sold, and other reasons that could make the decision to have the goods seized incorrect.
I wasn't aware that the TSA sold all of the stuff it confiscated! That's cheap goods right there! My mom works for a cruise line, and they don't confiscate stuff, but people do tend to forget all kinds of things they bring on the ship, so every once in a while the company has a big flea market available to employees. I find it funny when my mom comes home with watches and bracelets she wouldn't have otherwise bought.