You'll know right away to suspect inaccurate original mileage when you take it for a ride. These speedos (and the drive mechanism) were quirky and prone to failure and if it's not operating properly, it could've been that way for some time. Be very suspicious...no matter what the owner tells you (oh that? It just quit working a 100 or so miles ago)!
And the Spine frames are very different than the CARC bikes; as you can see by my ride list (I only list my Italian bikes), I have both. My 1200 Sport is a relatively refined sport tourer; the V11 is very retro and draws a lot of attention. To me the V11 feels like a much older design, with a few newer upgrades, like fuel injection.
Question: what upgrades (exhaust, crossover, suspension, etc.) does this bike have? This can greatly increase the value. There was a Café Sport on CL up in Santa Clarita for like $4k a few weeks ago...had like 11k miles, but that is a much more rare and desirable bike, with the factory Ohlins suspension and CF bits.