People don't wear Tommy Hilfiger and Nautica???
Not since the 90's, well there are some people that do but those people are buying in from department stores, not online. You can never go wrong with Ralph Lauren though. You need to take a smart phone with you and look up on ebay's compeleted listing what has sold and for how much. If you don't have internet on your phone, then take pics and go back home to do your research. This hustle requires a knowledge of what are good sellers on ebay, maybe spending a few hours browsing the completed auctions on ebay in the clothing section so you know already what sells and what doesn't, and the price ranges.