There is no comp in the country that is going to make an insurance company pay out 3.5 book value for a 100 series. I tried to get collector car coverage on my built 100, since it'd cost me about $17-18K to replace (not counting my labor!), and a few of the companies told me to pound dirt, they don't insure SUVs ... and the others have such restrictive use policies that they are worthless.
You aren't goint to have an issue finding a comp WAY above your example for an 07 with low mileage. Nice try using low ball numbers. Low mileage 06-07s 100s have comps well into the mid to upper 20s all day long.