Auction sounds like good opportunity test the valuation, though it might be could make it in sequels as UP has said. Are there any similar scenarios ever done before? How you can prevent people just bid without intention to buy ? Like some ahole just messin with auction
One way would be to set up an escrow. So people who bid would send their bid to an escrow. If they win, they get the NEM. If they, don't their money (minus a tx fee) would be returned.