I visited the North Store several times. Never bought a rack grade. If it's overall (mostly cosmetic) condition is important to you save a bit more and buy a service grade. You're never going to get a rack to look like a service grade without spending more money than what CMP asks for to start.
All the M1s I bought were service grade except one. I was at the North Store and found an outstanding field grade. How is got classed that I don't know. It was a WW2 receiver, Danish VAR barrel, gauged 2 at each end, a lot of Beretta parts, and a faint Danish crown cartouche on the stock. It's my best shooting Garand.