Looking for infor on price/where to get a 89 Head Gasket!

Hello Everyone... I got a S-10 the other day for 100.00. It needs a head gasket. It's a 89 Chevy S-10 Long Box Cab and half, I am looking for info on how much a head gasket is... Where 2 get one? Please help me out if ya could, Only 16 and I dont really got that much $$ :banghead: . So if anyone has info to one. Please let me know...