IME, demand comes in spurts. It's premature to declare the 500E market as "dead". When there has been nothing available on the market for years, and a product becomes available again, there is a flurry of interest and sales. Then demand dies out, until years later when the cycle repeats. Probably could sell another dozen or two kits in 5-8 years, but until then you might get one or two people per year looking, maybe. Mostly from new owners just discovering the 036 and this forum. Same for limited-slip diffs, sway bars, yadda x3...