I guess you mean RMB yuan, coz yen is the currency in Japan while Taobao is from China made by Jack Ma (and he has just become an honorary professor of my university returning from Tokyo to Hong Kong). I think the price is still somewhat reasonable imo.
Regarding on whether you shd get the GAN 13, as I have never tried a GAN 13, I can’t really tell about it. However, I have tried both GAN 11 & 12, and I can tell you that any version of GAN 12 are just way better than GAN 11. GAN 12 maglev is slightly better than the GAN 12 leap tho. Tbh the GAN 11 is just overrated at least for now (I guess it was kinda influential tho when it was first released)