I am not concerned about scams. Someone with a 1400 feedback is not a scammer.
And sorry about this MAS, but how is waiting until the last minute to bid, only driving up the bid amount. People are going to bid their MAX amount anyways if a lower price is still showing in the Highest Bid window.
By waiting till the last minute to bid, I am doing the same thing as Auction Sentry or Esnipe, I am just doing it myself by going to the Auction just before the end. It is quite simple really, put a 5 minute notify on your Outlook Calandar with a link, go the auction, check the time remaining, set your stop watch, enter your bid and hit confirm in the final 5 to 10 seconds. Its not rocket science.