WGAF what someone lists something for on eBay?
Why don't you ask the guy selling it.
Here is some advice you won't get anywhere in life speaking like that with people. Watch your attitude you just signed up probably got banned before. I've been here since 2011.
If you have been here since 2011 you would know about the Bitcoin mining cycle boom and busts. This isn't the first time when GPUs are sold out and people are marking them up on eBay.