Might have been suggested already. But tbh I hate upgrading. So things like frozen etc .. well I love them. So I certainly wouldn't mind seeing a limited amount (1-3 maybe) for sale for gems in the shop. While they certainly would have to be expensive, I think it would have enough interest from people for it to be a successful item for sale. I certainly would get it. Because no upgrading and less space needed for nobles. So I hope BB could consider it.