I’ve never had a buyer of a car ask which month my car was sold, and I’ve sold a Tesla.
i asked for that on every Tesla I looked at. I don't think the pricing was any different, I wanted to get a 2014, and all the 2014's with the same mileage were about the same price. BUT, there are two different 2014 cars. Sometime in September autopilot was available, prior it wasn't. To my knowledge there is no such thing as a pre September 2014 with autopilot, and I was told by Tesla they couldn't retrofit one. I don't remember the price now, but it wasn't much to retrofit a late 2014, and they stressed it had to be a September or later build, call with VIN to be certain.
In the end I found a factory autopilot car, Nov 2014
The blue book might have been higher if the car had autopilot, I didn't check, but it still was a 2014 car. If it didn't have autopilot I don't see how it would matter what month it was built.
I am really active in the Porsche community, and I know more than the average Porsche fanatic about them. A 1965 911, which is the first full year of production, (235 cars were built in 1964 and called 1964's, basically a pilot production run) is worth a whole lot more than a 1966. You see people a lot of times asking more and advertising their 1966 as a 1965 build, which it is. Still a 1966, and they get called out every time.
A 1964 with all of its original parts goes for up to a million dollars on a good day. How much did I sell mine for in 1978? I pulled the motor and scrapped it, too much rust for an 18 year old to afford to deal with. $2500 or so.
Back to the Tesla, I wanted to try it out, see what it was like to live with, and I wanted to try autopilot, and I wanted to spend as little as possible. So I had a specific build date I was looking for.