AUCTION END TIMES: Potts Brothers Land and Auction, Online Auctions are timed events and all bidding will close at specific time. Potts Brothers Land and Auction Online Auctions also have an auto extend feature. Any bid placed in the final 10 minutes of an auction, the auction ending will automatically extended 10 minutes from the time the bid was placed. Example: If an auction scheduled to close at 6:00 receives a bid at 5:59, the close time will automatically extend 6:09. The auto extend feature remains active until no further bids are received within a 10 minute time frame.