Rolex vintage 8171

[jamilf]

Guys

I found a nice looking Rolex 6062 that is in good condition. However the watch does have the tendency to start/stop even though it has already been cleaned and serviced. Parts(dial, movement) are all original and the price is still therefore steep. It was fine for a couple of days. I wound it today and it just doesnt seem to start.
Does it still make sense for a collector to buy a watch even though it doesnt work properly. Do people expect 60+ years watch to run properly.
How often do people get their vintage watches serviced.
Any immediate help would be appreciated!!