just be cognizant of condition. Just like cars, a little "patina" and wear is acceptable on a vintage piece, but on something that doesn't qualify as "vintage" any deviation from "showroom condition" devalues the watch.
Good luck and I hope you find that it is as good or better than you are expecting!
Damn you all, now I've realized that I "need" a Hamilton Ventura as well. I've spent most of my day off becoming reacquainted with vintage watch forums and sites...