There are those set collectors who prefer a raw card over a graded card. IMHO, this is that type of card. The only benefit I see to grading it would be to protect/preserve it. Best of luck with whatever you decide to do!
I collect 1969 Mets memorabilia and 1960 Topps baseball, nothing else.
My 1969 Mets PC Bucket:
http://s214.photobucket.com/user/d3a3l3e3/library/1969%20NY%20Mets%20PC?sort=6&page=1