I was struggling to sell a doll that I loved (and didn't really want to part with), so I put her up for auction on eBay. The person who won her got a great deal - much less than the doll was originally worth. As I packed her up, I took a lot of care in to wrapping her and making sure everything was in great condition for the new owner. I even left a little note at the top, congratulating the buyer on their new doll. It was sad to see her go, but I've so far only sold dolls to very loving new owners, and that's brought me a lot of comfort. I found the buyer's social media accounts, and peeked at them once I saw that the doll had been delivered. Within a few hours of the doll arriving, the new buyer put her up for sale again, for a higher price than what she was bought for from my eBay auction. Seeing this made me beyond sad. The buyer has every right to re-sell the doll, since it's their doll now, but I can't help feeling cheated and upset. From what I can tell, they had no intention of ever keeping, doting on, or playing with their new doll. I think they just saw an opportunity to buy a used doll for a great price, and then raise the price for other interested buyers. So, I'm curious. What's your opinion on people who do this?