I began collecting long hair 15 years ago. I tried ponytails on ebay, but they eigher were sketchy looking, or not long enough. I eventually found Wigs of Rosalie, out of Sparks, NV selling Elegante wigs for a decent price. I also bought lots of wigs on ebay from trusted vendors. I probably have 100 wigs.
I don't remember how I found him, but a vendor in China was selling quality tails at a decent price. All went well until Covid. After that, the only source I could find was 52longhair. Very good quality by very expensive.
I have around 30 tails, ranging from 110cm to over 200cm.