>>6026447Look into
http://bricklink.com/ It's a site specializing in facilitating the LEGO aftermarket. People make accounts and then they either set up online shops or purchase sets, parts, or minifigs that they want.
You should make a list of potential Black Friday leftovers and other sets that would end up "trashed", then look them up on Bricklink to see what the average selling price is. Set up a Bricklink account and store, put up your items for reasonable prices, and slowly but surely make some sweet sweet brick cash.