It may not be without storage costs but you still have to insure and maintain it.
And where does the 200 Cup rank in terms of desirability… probably behind the v6, 172 Cup, 182 Trophy, Williams, R26.R, Spyder, 200 Silverstone (?), 5GTT, 200 AG etc etc. Does it even make the RS top 10?
At the end of the day it’s your car, and your choice. There’s someone out there who might buy the car at the price you want to sell for, but it could be years before you find them. Personally I think for the money you might want, the target market will be very small.
A bird in the hand is worth two in the bush…