well, 6 miles isn't too far, if you take it REAL easy you should not find any codes in that distance, if you have a code reader you could also clear any codes a few doors down. (shady maybe) its why I paid the extra couple hundred to own my own flashzilla.
Also (don't quote me) but most of the tuners only charge a nominal fee to adjust, upgrade / reflash a tune, ive bought several iterations for this car since my initial 500 dollar purchase for between 50 and 100 bucks. You might also check with AArodriguez, they do rent a flashzilla, and I believe they can provide you with a stock tune for your car. maybe for reasonable money you can flash the thing in your garage and not worry about it.
To my knowledge there is no down side to having the CEL light on. it only has to drive in under it's own power so I am not concerned about codes or even showing up under limp mode.
With that in mind is seem like a waste of money to have is flashed back to stock.
Anyway thanks guys for your information thoughts and comments. I am going to try and buy it from the dealer, they have first chance to buy the cars turned in at their store. My feeling is they will want too much for it, their cars seem to be priced on the higher end of the spectrum.
It is a 2013 Golf with tec package, 90,000mi. needs tires, shocks, brake flush and oil change. I see the same car down to the color for sale in Massachusetts with 41,000mi for $11,385. My car should be worth an easy $2,000-3,000 less in my opinion.
I will post up if I make a deal with them. I am not in a hurry to buy one as they keep decreasing in value as the months go by.