I stopped years ago purchasing anything from Ebay when they would not respond to complaints about bootleg FIRMS. I would file a report every time I found one listed and I NEVER received a reply back .. only the automated response.
Amazon: hmm... up until several months ago, I would have said yes to purchasing sets from them. BUT-- now I would say no .. as I purchased a Chalean Extreme, only to find it to be fake. The seller did refund the money and I mailed it back to him. (dodged a bullet on that one).
As a seller on Amazon, I'm being accused of bootlegging right now. Not sure how it's going to play out, but Amazon CS said the buyer is in the wrong, not me. Due to me not refunding an item that she broke, she is now claiming that I used inferior products to make the dvds and that's why it broke.
Purchasing workouts online at these two places is becoming a hassle whether your the buyer or seller.
If the price is too good to be true, then it's probably a fake.