I just saw a Sadowsky Metro RV4 in the classifieds. I've seen the name on here before, but never actually seen one. When I looked at the pic, it looks just like a Fender Jazz. So what is it that makes these basses cost so much more? Is it the type of wood used, hardware, electronics??? Or is it just that there are so few of them made. I'm not trying to offend any Sadowsky lovers, just trying to get educated. I'm looking to buy a Jazz bass soon, and want to know if this is worth the extra cash.