Ebay is not what it used to be ... and that is coming from a former top rated seller on Ebay. ;-)
Once upon a time Ebay was about the bargain find, while today, Ebay is all about exploiting ignorance. If you want to pay much too much, then go to Ebay. There are still some bargains to be found there however, by and large Ebay is mostly about highway robbery.
When a seller can successfully list, and sell a $6 mini RDA for $68 (true story) something is really wrong. I recently had a run in with a seller who had listed some IGO-L's ... that turned out to be a little A7 RDA, re-packaged into an A6's metal case

How in the heck did this guy think he could pass off a tiny 14mm A7 as a 20mm IGO-L?? ... Long story short, I got a refund, and I kept the A7... and the seller who was exposed as a fraud had to change his listings.