I might have the opportunity to buy a R90S today or tomorrow LOCALLY for a very good price and I need to get up to speed quickly or the opportunity will pass. It was bought by this owner as a non-runner and is described as completely stock with the exception of stainless steel brake lines and master cylinder. The owner is busy but is more than willing to answer questions and show the bike but I have six competitors and if I snooze I lose. I know very little about airheads and I'm wondering for some quick tips on things to look for. Obviously frame and engine should match. That would be nice. I'm not looking for a collector bike but rather a decent runner that will hold its value. The owner, OTOH, has a collection of fourteen bikes.