After all the anticipation it turns out the car is... no good. Parents called up the Porsche Owners Club to have someone look at it. Apparently after a few hours scrutinizing it was determined that the clutch and gearbox were on their last straw.
I feel really bad now because my mother was very excited to go joy riding in this.
Also, it turns out that the owners of the car knew all about the car's grey history, they just 'forgot' to bring any of it up. No wonder the collector turned it down; the owners made the reason out to be the small tear in the leather seat.
With the coming of the bad news my parents have now decided to be on the lookout for Porsche models for sale. My mother really wants one now.
Thank you all for giving your input and advice. I was able to reference UCP to my mother when she was in the midst of pursuing her hopeful new car. I'll post back when she finds her 911.