This is not how auctions work, let me explain:
You set up a minimal price, for exemple starting price at 50 avengers + 50 MS
You set up a minimal bid increase at let's say 10 avengers + MS, so that it won't be 50, 51, 52... but 50, 60, 70... instead
People make offers, at the end of the auction time, you HAVE TO sell your items to the one that made the best offer.
You can also accept payouts, high prices at which you will sell the item and close the auction.
For exemple, if payout is 100, if someone want the item you are selling absolutely, he bids 100, even if the previous bid was 60. The first one to reach payout price also gets the item.
This is how auctions work, you cannot just say "guys I auction this and this" and at the end close it because the offers didn't suit you.