Can you post a picture? Some people here could give you a general sense of the value of your knife, but not without detailed pics.
Knives that are worth the price of a car are few and far between. It's not impossible, but you should keep your expectations in check.
With this said, appraising a knife is nearly impossible because knives are not standardized. There are knife dealers that will take a knife and sell it for the owner, and take a commission. You need to be willing to entrust the knife to the dealer and trust them to do their best. There are plenty of trustworthy dealers. Personally, I have had good experience with bladegallery.com .