An auction of 105 items from the collection of Padres great Tony Gwynn will close Saturday. The auction, which is being conducted at scpauctions.com, began April 8. The initial bidding period runs until 5 p.m. PDT Saturday. SCP Auctions spokesman Terry Melia said those wishing to bid on an item need to so before 5 p.m. Saturday in order to also participate in the “extended” bidding period, which could run into early Sunday.