Indybrad, offer him $600, I think its worth more(?) but he's your father in law/keeping it in the family, or whatever you can afford, make payments, paint his house etc. you should buy it!
It is a good look'n rifle. There is no crud in the action, everything clean and sharp, can even see faint tool marks inside the grooves in the pic of the muzzle, no wear on the bluing or parkerizing.
For dissassembling what Orlando said, and for more;
http://www.surplusrifle.com/garand/index.asp
Good instructions with pictures, the maintenance section on the right of the page.