I like these little Tamtechs.
I have all of the Tamtechs, both car only and complete kits. I also have all the bodyshells etc. I did have a plan to build an enormous Scalextric set in my house (without the contacts,of course) and run these round, but it never took off, so I sold a lot of them, but am left with at least one example of each. Can't find Testarossa right now, but I am sure it will show up!