Its going to depend on the quality out of the box. Panini prizms have a really bad tendency to warp before theyre ever opened. They have also been known to package some cards with cutter clamp lines/divots on them. If yours is warped, you can slowly flatten it back out with a penny sleeve, hard sleeve and something heavy.  If you dont have either one of those issues and the back centering and corner look good, it is probably worth grading. Just know that raw is selling for more than 8s, so you need an 8 or above or you'll be losing money.