How much is unique worth?

[Rock Studly]

Hi All,
There is an MSO 650s spider on Autotrader (link below) in a terrific colour (IMHO) and with a "want for nothing spec".
It is unique but at the price advertised its quite close to the bottom end of the 600LT and 720s range.
It is very tempting but is the uniqueness enough to justify the price?
I don't want to get into a "depreciation" discussion or about the merits of one model vs another but i am interested in your thoughts.
Thanks

https://www.baytreecars.com/vehicle-details/used-m...