How much is a factory 5 cobra worth?

I am wondering what a good price to sell a Factory 5 cobra replica would be, we are putting a 427 Cobra jet in it (Stroker) (550hp) and we are going to use the highest quality parts to Finish it. so what would be a good selling price? (the kit cost 20,000 and the engine about 12,000 and the other parts will cost a lot to.)