I dont know about that, as long as they are well maintained. The number of cars that will be under 50k in 3-5 years time will be tiny with only 550 coupes made in 3-5 years time that will make the oldest Z4Ms 12 years old. The low milage cars will be more like collector cars than enthusiast cars and will hold a premium.
Like now its pretty hard to find any Z3Ms with less than 50k on them, but the cars with 60-70k will be acceptable with people buying them looking to do work on them. The gap will be bigger but I think 50% of the market will start to even out with price. Also at 12 years old for most people these cars wont be worth repairing with the cost of maintenance so the cars not in enthusiast hands will start to be poor and will be more in the restoration type bracket, or worst case scrapped.
Like now its pretty hard to find any Z3Ms with less than 50k on them, but the cars with 60-70k will be acceptable with people buying them looking to do work on them. The gap will be bigger but I think 50% of the market will start to even out with price. Also at 12 years old for most people these cars wont be worth repairing with the cost of maintenance so the cars not in enthusiast hands will start to be poor and will be more in the restoration type bracket, or worst case scrapped.