You'll make more money if you take the time to sell them one by one (or 4x sets if you have them). Selling your collection in bulk will make you lose 30-40% but

You'll make more money if you take the time to sell them one by one (or 4x sets if you have them). Selling your collection in bulk will make you lose 30-40% but it's less time consuming. Ebay is the place since trading sites will pay you wholesale prices (they have to make a profit retailing your cards).