If that National Match rifle is the real deal and in great shape, that is about what sellers can get right now. In my opinion, that's not a fantastic deal only because I have come across a few pretty good ones lately. That said, if there is no surplus of M1As or good deals to be had in your area, you gotta go for what you can find.
If you can get a personal inspection period and really check it out before plunking down the green, that'd be the way. Some GunJoker sellers will give you a week or so to get a refund if you find something you don't like.
Best of luck with your search for the ultimate battle rifle.