Here is why it doesn’t work in simple terms for a simple person:
On E-bay, you have the potential for hundreds of thousands of people to see and want the product the seller(s) what to sell. Also, you have many of the same products selling at the same time by many different sellers. So you can get the max number of bids. In HBD if you have an elite player that will get a max deal in FA you may have five or six teams that have the budget and only maybe half of them are willing to go to the max to receive the players service. If FA were available to every world and the current owner of the FA was receiving the cash reward for the player, then it could be called an auction in an E-Bay sense.
The author’s idea here is for some sort of Blind Candle Auction. That is unless; he would like the current leading bid to be known. In that case, it would be just a Candle Auction. That is an auction were the bidders do not know when the conclusion of the auction will happen. E-Bay uses a Vickrey auction style, which is extremely bad for sellers. So let us say that for an instant that FA is the same thing as E-Bay. I am willing to pay $100 for a Paul McCarthy nose hair. I set my max as such and I have the winning bid for $60. How is that good for the Seller to only get 60% of what I was willing to pay?