There are a lot of knowledgeable cyclists here... but my .02... those bikes are nothing special, both are basic department store bikes. The mongoose looks liek the walmart version, and the "Ironman" is a Huffy. That's fine, but just know that you aren't getting a super great deal here, especially since you are going to drive 3 hours. Those bike were probably only $130 brand new. Personally, I would not drive 3 hours for those bikes. I would spend that extra money on a better bike (or just use the $30 in gas and go buy the same exact bike brand new at Wal-mart for for another $30).
I am not a bike snob at all, but I do think you can get a better bike for the same money or without the drive. I personally would spend another $100 and get something decent.