Advise, please.
 
I am close to buying an 85 GL. It is in = good to very good condition. No rust. No damage. No smoke. No = electriquirks. NO LEAKS! Runs strong and smooth. 75mph on the highway. However, the = original engine has 187,000 miles to date. The seller says it has not = been rebuilt or replaced. The price is $1700.
 
He was a certified VW master tech = for 15 years. He has owned the van for 11 years. Garaged and maintained. He = seems to have a lot of confidence in it.
 
What is a good guess at the percentage of original engines lasting this long in this = condition? Should I be very worried, or just a little?
 
Thanks,
Jeremy