I'm glad to see that you were able to run the VIN and everything looks pretty good.
Sounds like (if it's not just a sales pitch) they repaired the tire correctly by patching it from the inside.
When (if) you follow through with the purchase, open the glove box door. There you will find a label with most of the RPO codes which when deciphered will confirm what options and accessories you have on the vehicle. This link is for the Saturn Outlook RPO codes. You can Google any others you have that are not listed. I believe the codes for the outer color and the interior color is also contained within the RPO label.
Timing chain is something you will just have to be aware of. Nothing you can do about it except maybe use good oil and change it every 5000 miles regardless of the oil life monitor (OLM). Just don't ever go all the way down to "0" on the monitor.
If it is OnStar equipped (look at the rearview mirror or read the RPO code), there was a promotion recently that you could call them and get a free 3 month subscription for trial use. Sign up for the monthly report, and they will send you updated info on the running condition, any recalls, and general vehicle health report. If you decide to continue with OnStar, there are several posts on these forums telling how to obtain the best price.
I would have the OBD read by Auto Zone or one of the other major auto parts stores that do it for free before disconnecting the battery to clear the memory. One owner purchased used, and within several days the light came on and he had major problems. It is believed the dealer may have disconnected the battery to clear the codes before placing it for sale. Just something to keep in mind. Sometimes reading it will tell of any pending codes, or if the vehicle has not been driven enough since the last resets for codes to be set.
Let us know how things go. One more question. Have you priced the G/Y tires yet that YOU might be paying for if you replace them?