what should i expect to pay 8 3/4 chunk?

yeah, i'm just wantin' sometin' to hold 350hp...and i know a 8 3/4will do it..no need for a sure-grip right? everyone says go with the suregrip...but if i can go to a boneyard and pick up a 3.23 3.55 or 3.73 for like $100, bein' i'm not usin' it as a drag car, i'd opt for that over a $400 chunk...

am i being stupid here?