Hmmm Spot price of silver now $29.15, so 18.50 grams @ $29.15 ( to end in 8 days time ) is $17.34. Since the seller DOESNT know in what percantages the PMs are present in the scrap, the auction bidders ( and there will be bidders here im sure ) will assume the worst and 'assume' with their bidding action that its all silver and bid accordingly. However if there are at least 3 diff bidders on the item and there is at least 3 days left til end of auction, than this will finish at least $57 ( new assumption that there is at least around 1 gram of GOLD or Platinum ). maybe the bidders will 'watch' the item only so that the price explodes with a few hours left to go at auction. I dont know, but pity for the seller that he doesnt know the exact compostition of scrap.