On my quest to find a good beater acoustic, I found a guitar on Craigslist. The guy was selling an Epi Masterbilt AJ-500M for $50 and I figured it couldn't be true. Turns out, he bought it for his wife and she didn't want to play, so he just got rid of it. Came with case and all kinds of other accessories he bought. On inspection, I realized it was an older model - looks like mid 2005 - so I did some more digging to its value. Some guys online talk about "first run" guitars having a little more value due to build quality and the like. I have tried finding what qualifies as a first run to no success. Anyone have a clue on this?