I buy and sell a LOT on Ebay, however, with park passes (not just Disney) for which you cannot tell if they are used or not by visual inspection, you are taking an extremely BIG risk. Oftentimes, the passes may of been used by one or more persons (and the seller is not the original purchaser) before they go up on Ebay. The only way you can tell if Disney passes are valid is when you are in Disney World (I think the hotels there can check; and of course when you try and use them at the parks), and its just too big of a risk that they are expired. Bottom Line: You saved enough to go on vacation, why risk ruining your vacation and a lot of money, and causing yourself unneccessary aggravation, by buying passes which may (or may NOT) work until you actually try and use them.