Sorry to say but if you won't put a deposit down it's your loss not the sellers.
I've sold many pins over my 20 years of collecting. I always try to sell in line of requests, hold games for a few days for people to (come look at). And have never sold out from under someone because another person offered more (unless I realize I under priced an item and pull the ad to correct price.) I've held many games for people that said they had to wait longer then a week or two with no deposit down. Over half of these people never show up or have some emergency that they can't buy. Won't do it any longer. You want the game and can't pick up within a few days I would only hold it with a deposit.