I've only seen a couple for sale in the (almost) 4yrs I've been here. When people buy a Teddy babe they pretty much know what they are getting so there is rarely any buyers remorse and they don't get sold on. With tpe (and less so with silicone )a lot of people are buying a doll for the first time and the biggest thing that catches them out is the weight. Either they can't carry her or have problems hiding her. So they get resold quite a lot.
Best of luck with your search. My tb Krissi is staying with me forever
