There was a discussion about that just recently. I think it's a wrong approach to look at it from the angle "it could sell for X amount", which makes it sound almost like gold rush. The fact those companies are asking for $300k for a vehicle doesn't mean there are a lot of suckers willing to put up the money.
I think the best approach is to consider if you can make a viable business doing economy work, build up the technical expertise and portfolio, and then deal with "luxury" stuff when you actually start getting the requests for it.
I think the best approach is to consider if you can make a viable business doing economy work, build up the technical expertise and portfolio, and then deal with "luxury" stuff when you actually start getting the requests for it.