So about how much is it to replace the timing belt on this car?  I'm looking at several cars so if this one is a "finalist," it'll definitely get a pre-purchase inspection.  (A few years ago I spent a total of $190 on PPIs and it saved me about $5,000.  A $90 PPI on a Forester today saved me about $3,000, so I'm a strong believer in getting a PPI!) 
  
Remember, there is basically no noise at idle, it only shows up as I accelerate. 
  
I should have known to check with a metal rod or pipe, that just slipped by me.  If I were at home working on my car (which is an '85!), I would have thought of it, but not on a car lot where I didn't bring tools or anything.  Thanks for pointing that out!