I'll swim against the current here. If you need to ask a bunch of guys you never met if you should keep it, maybe you've already decided in your mind to sell it.
The thing here is- these cars are replacable. It's not like any of us own a split window '63, or an original 356 Carerra- we have replica cars that can be replaced pretty easily (although not as inexpensively as what you have in your car). It's the beauty of a replica.
My advice? Forget about us. Ask yourself, "If I sell this, will I ever replace it?" and "Can I live with that, if the answer is no?". Are you going to see a pile of money just sitting there every time you look at the car? If you are going to regret keeping the car every time you drive it, then sell it. Your family has to come first.
A bit of advice on cars in your price range- $10K is the absolute floor. Your car will never be worth less than that- winter, spring, summer, fall, now, 10 years from now- ever. If you you want to keep the car, and can scratch by on some other funds, but still need the money in 6 months- it's still worth $10K.
I'd ask my wife, if I were you. She likely knows how much you REALLY like the car, better than you do.