Had a guy I work with look up some prices for me on a head gasket replacement with new timing belt...he said a "timing belt kit" is $154..what would be included in a kit? He claimed new tensioner i believe...does this sound right? Also the head gasket set was around $200....

Would appreciate any input on these prices or any other good sources for these parts...I wasn't expecting them to be so much....

Thanks,
John