Has anybone snagged any of these offered by Mitchells? I was thinkin i was gonna get somethin special if i bought the "collector" condition rifle but then i looked on the website and they have to higer grades "premium" and "museum quality". I would like to know what differences designate them as higer grades, i would assume slight handling marks and such but when theres a $200 dollar difference between "collector" and "premium" and $500 diff. between "premium" and "mus. quality" i can only wonder. Help?