The odometer motor probably quit. There have been several threads on here regarding replacement of the motors, so this is not unheard of. 200K on an L35 in a lightweight pick up that doesn't tow is barely middle age. I had an L35 in an AWD 4door that worked its heart out towing, and is still running strong with over 300K on it.
Tough to be sure, but it looks like the RF bumperette is missing. Pricey part. He doesn't show pics of the areas of deteriorated paint he mentions. Some pics of the undercarriage, engine, and bottoms of the doors and tailgate would be helpful too. I'm an old skeptic, but when people don't show the whole story, I figure they're hiding something, and have to proceed carefully. especially on a long distance deal. I've been burned because sellers didn't disclose the "full story" prior to my making travel arrangements to conduct an inspection and deal.
But it looks like it has potential.