This car is an anomaly and I tend to doubt that it is actually a Vintage Speedsters built car. Although there are pictures with the top up and the interior looks like a typical VS interior, there are pictures that don't show any top attachment in the rear, behind the seats and the trunk carpet is not like any other VS car I have ever seen! Additionally, there is a kill switch located in the back area behind the passenger seat, which is where JPS sometimes locates them, but I don't think it's a JPS either.
Also, the car appears to have a windshield washer spray system! I see spray nozzles on the front cowl and a reservoir tank next to the battery. No Vintage Speedster I am aware of has ever had that!
Interesting that the seller shows a Vintage Spyder brochure in one of the pictures!