That used to be true, but the porcelain center has moved away from Jianxi to southern Fujian and Chaozhou many years now. The gaiwan produced in these two tea regions are much better designed for real use. The quality has been improving and the price is a lot more reasonable. I have been using gaiwans from either of these places for many years now. I get mine from a neighborhood teashop, which compares well in price with those in the internet.
Teaguardian.com has a very good article about selecting a gaiwan. I am not going to add to their well written essay here, but I can tell you that only the extremely expensive handmade ones from Jianxi (in particular the town called Jingde) is worth the investment as a collection. Others are just over-priced mechine-made or half mechine made stuffs.
