I'm not expecting any sportscard purchase in that grade range to be a wise move.
I guess it depends on your budget. If your budget only allows you to buy that card in that grade range, so be it. However, if that is the case then having it graded would definitely not be a wise move. You wouldn't add any value to the card.
Collecting 1965 Topps High #'s SGC 88 or better: 10/91
BUYING Well Centered:
1956 Topps SGC 84 or Better (or raw equivalent)
1965 Topps SGC 88 or Better (or raw equivalent)