I bought the same gun except in .357 Magnum a couple of months ago. Super nice New Vaquero, and I thought I got a deal at $607! Your deal is the cheapest price I've seen so far.
The Talo "Star" grip panels didn't float my boat, so these "bonded ivory" ones from Altamont replaced them - they fit pretty good, Altamont doesn't make any checkered black plastic grips for the New Vaquero, but do have several checkered laminated Rosewood panels that look nice: