In this case a “bot” is an automatic computer generated bid that drives the price up. It is used when they have an item that they want a minimum price that they will sale the item for. The algorithm is built into the bidding on the item and it will keep bidding to get the price there. If the minimum is not met then then there will be a last second bid that wins. The problem is there is really no actual bidder and the item gets relisted. Some of the auction sites have very sophisticated methods of doing this, ShopLC isn’t one and it is very to easy to spot if you study it for a little while