I don't shop on ebay but is there a way that the seller is a scammer? so if the prices are high, that means that they're already a scammer to you.
Well as I understand what you feel, I'm not going to do such a thing for the sake of what I feel about them. They really are overpricing GPUs but I'll wait until the dust settles and won't waste my time either doing such.
I'll wait until Nvidia and other manufacturers produce new GPUs which will have a lot of supply again in the market pushing the prices of these overpriced GPUs down.
But we'll never know when it will happen.