In places like ebay the sellers are a tad more experienced and they have more exposure to the "market price" so it's harder to get a better deal. You could still get a small deal and try to sell for an inflated price on craigslist, but I'm of the opinion that it's just easier to find buyers who will buy at the market price on ebay rather than buyers who will buy for an expensive price on craigslist. Even more so with specialty / collector style items.