With that said, you seem to have a group of sufficiently valuable books for which there are likely buyers out there, but not necessarily all checking things on ebay in a given week among those willing to pay the right price. mycomicshop is probably a good place to stick them, price them where you feel comfortable, and wait it out, unless you need cash quick. price them at 10-15% below GPA if need be. the only problem with MCS is that there is no best offer option, so if you have a buyer, but your price is high, but you would negotiate, you may never find that buyer.