Casey, your car is flawless and tastefully modified. I think the low teens is about all most people would pay. I would think that most people who would want your car couldn't get a loan on an older car and it's not considered a collector car yet. So selling it would be a long process anyway. So here is my very blunt opinion,
DON'T BE STUPID, KEEP THE CAR, YOU WILL REGRET IT.
Responsibility can't always be first priority, there has to be a few things in life to make it interesting. If you don't have to, then don't.