It definitely depends on who you are selling to. Competitive players will not buy for much because they are only concerned about cards that can be played in the current format. However, collecters will pay top dollar depending on which cards you have. It is extremely difficult to price a lot like this with little info about the contents but i would say you are much better off selling your higher value cards individually on eBay, and then selling your commons, uncommons and non-holo rares as lots on ebay.