Now I know most of you don't have a Lotus, but imagine it was branded with the logo of your favorite vintage ride, and put a price on that please.
You're essentially making a "bootleg" copy, using a brandname and artwork which don't belong to you. The price i would put on that is not much more than I would put on a generic branded bottle.
I recognize the time and effort spent to vectorize the artwork and have the items produced, and you should be compensated for that, but I don't think you should earn any extra money for using other people's intellectual property without their permission.