Guest,
It's not bad that's for sure. They are not stealing it. But if the rifle is
really really nice with no bluing blemishes or rust or bad dings to the wood it could be just a bit low. If you would register and submit some good clear photos that would help. If you really need $750 take it.
The photo is a 1958 vintage asking $725. You can kind of compare.
Good luck
2bit