1979 Cobra Value?

I was just wondering if anyone could give me an estiamated value of a 79 cobra with a 306, Aluminum GT40 heads, roller rockers, mild cam, holly 4 barrel carb, edelbrock intake. 15 gal fuel cell. full length sub frame connectors. say the interior is a 7/10. rebuilt rear diff. Needs to be repainted. aside from needing paint, body is a strong 8/10. no rust anywhere. C4 trans. and please, don't give me the, its worth whatever someone is willing to pay for it.