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

i'm sayin' a non-posi wil hold uo fine for now..and maybe a year or two down the road i'll grab a posi cheap at a swap meet or somethin'? just need a center chunk so i can run the car that's all...but i wanna stay near the mid 3's so i can still burnin'm a bit..if i want too..hehehe