Yea I see your point but what is the difference if that $5000 sled sells for $4500 and that is what the seller gets (and the buyer pays $4950)or the seller pays the commision and the sled sells for $5000 and the seller still gets $4500. They still get there commision. I as a buyer don't like buyers premiums either but as long as you don't spend more then you intend to and adjust your price it all works out. As far as the sales tax at all michigan auctions if there is a registration there is sales tax. Cars, bikes, toys, trailers....