The only advantage I can see to sniping is not to call attention to an auction that is being overlooked and be the only bidder at the end. For instance, I felt sorry for this one and his other items because he doesn't know to space out titles properly, which means many of his games don't show up in search results. I contacted him to tell him that, but he didn't change, and he lost $15-20 on NG3.

But if no bids are placed it goes less noticed, perhaps, or I thought maybe that was so. Otherwise it's just a matter of placing whatever you're willing to pay. The psychology of course is that no one really knows what they're willing to pay and the intense moments at the end you end up putting in a little more, or a lot more like in that scene in War Horse.