If this is your first time bidding, we strongly recommend that you don't leave your bids until the closing seconds but familiarize yourself with the bidding process earlier on. You can place a low bid early on to start you off or if you know what your limits are already you can place a maximum bid. With the time extension feature there is no real tactical advantage to holding off until the last minute as other bidders will always be given the opportunity to come back with a counter bid.