The bags themselves would most likely be ok. You might have to investigate a different mounting option though. The fender rails for the Hammer and Jackpot are different from the Vegas, and that's the mounting point. If the auction lists the manufacturer or brand, you should be able to check out their site to find measurements and mounting options. They look like Viking bags?? If so, I believe their quick disconnect mounts will work.
2012 vegas 8ball