You didn't mention barrel length or grip material. Some combinations are very low production. Even so, it is estimated that only about 10% of Vaquero production was in 44/40.
That being said, there was some trouble with the size of the forcing cone since Ruger used 44mag barrels. Some of the 44/40s shoot just fine and some do not. I think there are some threads on this forum about solutions if it doesn't shoot as well as it should.
It's a good price on a robust gun in a classic cal.
Terry T