I agree. A dealer would probably gladly buy the whole collection, but, if you break it down into individual pieces, you likely would not receive a fair price. There are auctions you could use, but there is usually a seller's commission to pay and some auctions are of dubious repute. Selling to other collectors would likely get you the best return. You might consider listing a few at a time here and keep repeating the process. If something doesn't sell, you still have other options to dispose of it through other means. A lot depends on what you have, condition, rarity, desirability, etc. Remember, too, most collectors look for bargains or something close, so you would have to price things below dealers' prices somewhat, unless the condition is significantly better than what dealers ask.