Some are second-hand transfers, or others change hands to buy and sell, and the low price is normal.

It may be second-hand, that is, the seller sells a certain configuration he wants, and the rest is not. An autograph session will be held when the album of Han Tuan is released. The more you buy, the greater your chances of winning the prize. If you don't win, it's useless to keep the album in your hand, and you're out. As long as you walk on the platform, there will be no problem.