If it is a music box, then it is part of a 2 peice set with Princess Minnie (sold seperately). When we purchased ours, they came with a stand and a key for the music box, which is inserted into their back. The key is shaped like the mickey sillouette. They do show up on Ebay occasionally, but some of the sellers are starting way too high, time after time, and they don't sell. I have seen a couple of new in the box ones sell, but i can't remember how much. I think that you might be lucky in the $50 range, but without the stand or box, you might be less. The only problem is that they don't seem to garner a lot of interest, so if you start an auction too low, there might be only one bidder and it sells at a low price, if you are lucky to get a couple of people bidding, it could sell pretty well. It is luck of the draw. I haven't been to any of the Disneyana collectors shows, but you might draw more consistent interest at something like that. Please let me know if you have any specific questions, I can check the box or dolls at home.