I've bought literally dozens on E Bay. Read the reviews of the sellers to make sure you're dealing with a trustworthy source. The adrenaline rush that comes with last second bidding to try to win that trophy is incredible! I will admit that there are times I've spent more than I should have, but the collection I have amassed is unbelievable. I also have tails that Don cut and sold on the old HWAS site. A 30" Chinese tail that came with a video of the cut. AND, I bought a beautiful long blonde tail right here on Kinky Forums from a poster that was selling his wife's freshly cut tail.
DEFINITELY worth it. (To me, anyway)
Good Hunting!!!