I have found a Dahon Speed Pro (Not a TT), Steel version V-brakes 2005 model in a pristine condition, the owner (70 years old) bought it in 2010 as a first owner and he has 9 other bikes so it was used only a few times.
The difference between the Pro model and the Pro TT model as far as I read are:
1. 24 gear Dual drive Sram X7 instead of the 27 gear shimano 105 deraileur
2. Avid instead of Shimano STI Shifters
3. Avid instead Shimano STI brake levers
4. Cane Creek bar ends instead of the famous Drop Bar on the TT

Would you spend around £400 in 2021 on this Speed pro version 17 years later? Does the bike performance and condition justify it? If not what's an alternative?
I have been curious about this one as it was considered one of the fastest Dahon bikes.