I get the whole "bad for 501st image" to sell it so quickly, and I agree, but how much were the kits to those 75? Like $2000? Yes, $4500 seems high and a crazy price to spend on a suit, but given the cost of the armor plus man hours for building (looks to be intense from build threads) plus the fact that you can't get the kit until late Q4/early Q1, I think his price is just a little higher than what I would expect for a ready to wear suit but not entirely far off. For anyone who has this suit and wants to sell it, supply and demand is in your favor.
Again, I don't agree that he took to eBay to sell it and feel he should have done so on this forum.