Predators? If such a thing did exist, it wouldn't seem to be very predatory to set the buy now price under current market value. However, the only real predators are the ones that are seeking to commit fraud of one form or another. Sellers have every right to set the price on their item however they want, just as buyers have every right to decide what an item is worth to them. Sometimes it can be worth it to a buyer to pay a small premium for the guarantee of not being out bid or to simply limit the wasted time spent searching for a particular item and a seller can take advantage of that. Other times the seller is in a hurry or doesn't know the current market, sets the buy now price to low, and the buyer takes advantage.However, I think that this is the behavior that the current predators on Gunbroker are relying on - the buyer's belief that a new seller has mispriced a buy-it-now item and the need to jump on it quickly before someone else does.