I mostly do for blindbags rather than full sized ponies but they sell both. Search "mlp rarity" and you'll find some. youngltd (829) and weyb889916 (9,278) are the two that I have completed sales with recently with me purchasing multiple times from each. I've also bought through mangoflavorcm (14016) multiple times. My only dissatisfied transaction wasn't the seller's fault but I was purchasing multiple ponies from luckguy2016 (6,272) but had to get a refund as the stock was apparently in an accident on the way to the airport for shipping and they had no others [and seems to be out of the pony business entirely].