Looking to buy a SW

There is a 94 SW with 195K miles, auto, Pw, Pl
They are asking $750

How do I know if its a SW1 or SW2?
What kind of problems do I have to look for?
Any other advise?

SW1 = single overhead cam
SW2 = double overhead cam

This thread discusses what to look for in a sedan but should be just what you need.
http://www.saturnfans.com/forums/showthread.php?t=59725

Good hunting. :)