My friend has a headless Steinberger bass and she wants to sell it. She said it's from the first run or it was one of the earliest years (I guess this is supposed to mean it's more valuable). Is there an online resource to find out more about these basses? I think it will help her on Ebay if she can describe the bass with an educated frame of reference. Any idea of how much (in general) these early Steinbergers go for? Thanks!