How thick is too thick?

Hi, guys/gals.
I found a good deal on a longboard locally ($90, water-tight, good condition) but the thing is, it's 3.5 inches thick. Will that hinder the maneuverability of the board much say, compared to a 2.75" thick longboard? I'm only 132lbs so I definitely don't need that kind of thickness, but if it won't hinder the performance much, I'll go for it.
I'm not really familiar with longboards, so for all I know, 3.5" could be the normal thickness.
Edit: It's 9' if that matters.
I found a good deal on a longboard locally ($90, water-tight, good condition) but the thing is, it's 3.5 inches thick. Will that hinder the maneuverability of the board much say, compared to a 2.75" thick longboard? I'm only 132lbs so I definitely don't need that kind of thickness, but if it won't hinder the performance much, I'll go for it.
I'm not really familiar with longboards, so for all I know, 3.5" could be the normal thickness.
Edit: It's 9' if that matters.