For $10,000 I'd expect a beautiful truck.
I know of a '69 for sale at $13,000 that hasn't had a bite in several months. I think it would not be hard to find a similar truck for half the money.
I watched the odometer in my '72 roll over last summer. I don't know if this 33-year-old truck has 200,000 or 300,000 miles on it. The motor in mine has been replaced with a Targetmaster which is showing its age.
Unless you know the seller and really trust him, I'd never believe the 51,000 miles on a truck that has required engine work.