There could be a plausible explanation for almost ANYTHING. But if you are going to base a pricetag on miles you need something pretty solid to back it up. That's why I asked earlier what records he has. I am assuming the 6K is the odometer read? If so, it is really a question of 6 or 106. The car looks like somewhere in between. Without strong evidence for a changed odometer, we assume it is one ore the other. So, is it a little roughed up for the lower or is it a really nice 106. Mine has near 75K and I had the same questions of was it rolled over. I have a few oil change notations with mileage from the 1990s to support that it is original miles. the Engine actually looked too good inside for 75K, (could still see honing marks on the walls and the crank bearings were all in spec)but why would a slant be rebuilt below that mileage. You just don't know what you don't know....