I'm looking into getting my first upright. I found an upright bass on Craigslist for $700. The seller says its marked down from $1800. My concern is that it's setup for jazz. I already know I will have to get it setup again. But I wanted to know if there was any structural differences in jazz basses and rockabilly basses. I do eventually want to add on some type of pickup system and I've heard basses with good acoustics tend to have feedback problems.