Last sales on the /75 version are $30 and $34. Being a 7 if I was going market price I'd probably just play my luck on raw. What were you looking at for it?
I checked the Card it is POP 2. Highest grade is PSA 7. I grade a lot of cards, it looked perfect to me so not sure why the 7, some of the thicker cards don't grade as high as 35pt Prizm.
So according to that though there has been 7 thomas variants of the same card that have been graded all graded 8 or higher bar yours and the other /75 that is also a 7?
So in reality every chance of a higher grade from raw and I would still rather buy raw at market than buy a 7.5 at market as tbh what's to lose.
And as much as i want to believe you no card gets a 7.5 that looks perfect, there is clearly minor imperfections that are causing that grade.