When getting in the middle of a deal for your relatives you want to be sure. How many miles versus price and condition. Consider having a good current volkswagon guy go over it. May improve your barganing position if he finds some items. Also make positive of when the timing belt was last changed with proof. About 500.00 to change it properly. They require this service about every 100 thousand miles for sure. Sixty thousand on the automatics. I personally would not buy the automatic. It gets a lot less fuel milage and is very expensive to replace if it goes bad. If you do not get any information the belt was done you have to assume it was not done and have it done if the milage indicates. Also look at the computor codes to make sure a bad turbo is not hiding in there. The volks guy will do this. With that year back bushings may need replacement but again the volks guy will catch it. The basic thrust is your sister is counting on you to not get a bad deal. You may never hear the end of it if you recommend a bad car. Save your posterior by getting an evaluation. In your case that is smart money spent.