Even raw folks should appreciate a TPG giving it a grade and confirming that it is not altered.
For the most part I am one of those raw folks, but as FYS said, I would grade any regular issue Mantle.
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)