I also have a test vehicle tag in my engine bay. I know the history of my car, though, if it's helpful. My car (detailed in my sig) was owned by Ford and driven as a daily driver/tester by an SVT engineer. When the test period was coming to an end this engineer told a friend of mine who also worked at Ford that it would be coming up for sale if he was interested. My friend bought it and drove it for about 2 years before he sold it to me. I find it an interesting bit of my car's history, and your's apparently!
