you are absolutely correct that a P1450 code doesn't automatically lead to the conclusion of the purge valve. However, Ford and Lincoln have had issues with purge valves on their vehicles going back a while and I believe TSBs on other makes regarding it as well. I am able to read the vehicle codes and in general look up the most common cause. So, for minimal effort and less than $30 it is worth it to replace the part and verify at the very least that is not the issue before moving forward to other options. their diagnostic equipment is capable of a lot more than just general code reading and for somethings that is worth that initial cost. I didn't see any harm in them replacing it if I had asked them to.
I didn't bring the car to them for the CEL. I had them perform multipoint inspection and service and had the tires replaced because one had a sidewall bulge. So had them mount and balance and perform a 4 wheel alignment. All of this gives me either a list of things they find needing fixed or no list of things (as was the case) for driveline and mechanical and they did note that the CEL was on but I didn't request or turned down diagnostics.
the CEL was not on when I purchased it, came on a few days later, I can reset it for a period of time but it does come back.
Regarding the emblems I was assured before bringing it in that it would not be an issue and that they could use the VIN. I did ask. I purchased the car approximately 2hours from where I live. it was near King of Prussia, PA. so going back to that location is not ideal but the price was where I wanted it to be with the options I was looking for.
-s