Auction is the easiest option though possibly the one with lowest returns. Few people want to buy large collections and if they do the returns will not be full value because they will almost certainly be buying for resale. Equally, few people want to buy random groupings unless they spot something special or get items cheap enough to resell. Shipping is a big issue in all cases; it takes an awful lot of time and effort on your part just for a start and bumps up costs significantly for buyers. Another option is to donate to a charity and let them have the hassle of selling. You could sell the better ones yourself; they would likely be bought by collectors if the price is right. However, you have the hassle of accurate listing and descriptions (very important for collectors, particularly in regard to any damage however minor) and shipping