Either of those bikes would be a steal at those prices. The question is going to be: What kind of riding do you intend to do? The Dirtbag is a freeride bike, and I'm going to guess that the Lucky is, too. Is that the type of riding you plan on doing? If so, go for it - whichever one feels the best and is in the best shape. If you're planning on doing XC, take a pass because the bike wouldn't be suitable for it. Good luck.