Sorry for disappearing since then, been worrying about rentals and borrowing cars and such.....
. Anyways, thanks for all the advice guys. I think I may take the deal and then save the Viggen for later. I can do my own wrenching, just not now lol.
To answer the question on Location, I am in Chepachet RI (top left corner of the state)
To answer the question of how certain I am. TBH I am not, however the saab mechanic I took it too seemed positive it was. But regardless if it were a head gasket it would be easier for me to fix it up for a fun little weekend car, or back up. Its the black 4dr so I imagine it isn't as desired as a coupe or the lightning blue colored.
Once again Thank you all for the help, and the story of my "new" project car shall continue lol.