I would like to clarify your sniping rule stated in OP to avoid confusion at the end of the auction.
SNIPE: Any bid made in last 10 minutes will extend the auction 10 minutes beyond end time until no new bids are made.
Does this mean if a bid is placed at 16:55:00 EDT (5 min to go) the auction is extended to 17:05:00 or to 17:10:00?
Thanks. Geo