$1200-$1500 is about what you'd expect to pay to get a Garandset up for the National Matches. Remember, Garands and M1As dominated Camp Perry for quite some time, and still do very well there. A single hole at 100 yds would be a nice setup indeed.
As a historical WW2 collector piece, your rifle bears about the same resemblance to an original Garand as a P-51 set up for the Reno air races does to a mustang taking off from an airfield in Englandin 1944. Thing is, both versions are beautiful examples of classic machinery at its finest. What happened to that rifle after the war is as much a part of its history as what it went through in it's first 2 1/2 years of existence, and it sure as hell doesn't mean it's worthless.
Who was it who said the only interesting rifles are accurate rifles?