I haven't read the article.... (not + member) but one thing to be very WARY of... is the front lower frame rails. The passage from engine compartment to wheel well is open and collects dirt, and road crud. Under this collection area is where the lower control arm mounts to the subframe.... So, if you are looking at a SAAB 900 series... this might be one of the first places to check for serious frame rot/damage