The premier league tried but the clubs refused to vote for it in enough numbers. Its a closed shop of cheats all round. You do it before you have any chance of qualifying for europe so uefa cant do you over The prices being quoted as their claim for value is absolutely ridiculous as well.
More reason to ban it though. Really though only so many things you can sell. As long as it's to real valuation and the club then don't buy it back from the owner for a lower price all they're doing is kicking the can down the road. Eventually clubs run out of hotels, training clubs, and women to sell.