This auction will be interesting to watch to see what value it ultimately attains, in part because its one of our family members cars...
As a comparison, exceptional, superb Fours can go as high as ~12K or more, but those are usually all original, very low mileage near immaculate, desireable cars like the 73-74 2.0 fully loaded.
For a comparable Six they go to what...20K plus for a similar condition, original car.
Ricks yellow car is not original, its been restored, but it seems to have most of the goodies everyone wants...the Raby engine, very clean, low mileage...very babied. The reality is that it is not an original car, but a custom car, and the person who buys it will have to like every mod done to it...like them all alot for that Buy it Now price...which isn't too far of a stretch knowing the cost to replicate that effort.
Good luck Rick...you will get your price or you will keep your car. Either way you win...