1969 dodge dart roller, whats it worth?

Im considering letting the 3rd member go with it, its a 489 case with 3.73 Sure Grip, everything is less than 6 months old in it, spider gear set, ring&pinion, bearings..everything. I have almost $1500 in it, I bought it worn out for $500 and had it brought back to life, it works perfect. I just figured it wouldnt add $1500 to the value of the car so I might as well hang onto it. Any thoughs on that?

Ebay: The dart is up to $200! awsome!