KBB is irrelevant in these circumstances. 50mpg? That's rather important when gas prices are $4.00 a gallon in some parts of the country. That means your fuel costs are cut in half versus driving your mom's Pontiac Vibe (not directed towards you tegSPEED813). Unmolested and low production numbers? That affects value. $5k? Maybe not, but probably close.

GLWS!