I suppose that the same price of the bikes is in the range of $4k - $5k. For me, I like working on my bikes. A few years back I bought a R75/5 for $2k. It didn't need much urgently other than carb cleaning and adjustment. I didn't let that stop me from taking it all apart just because I wanted to do so.
I already have a /6, /7 (77R100RS), and a GS/PD and so I had tools and many relevant spares. I agree with others that have indicated that the /5 will hold value long term better than the Mystic.
Personally, just based on looks and preferences I'd take the /5 over the Mystic.