With a larger amount of the population out of work than normal, it is a buyers market. Most sellers will have to lose money to sell their cars. It is just the way things are. The average American is not spending $20,000 + for something they will use 1 day a week for 8 months out of the year. The car you pointed out appears to be a built car. It does not look like it came with a 426. To a collector what makes value is what the car came with originally and how much of the originality of the car remains. Personally I would rather have a 440 + 6 non numbers matching car than a 318 car with a Hemi. Some are different in this thought. That is good. We need a variety of people in this hobby to keep it strong. If you can keep your car, I would do it. The only way you may not lose on it, if you have to sell it, is because you have had it for so long.