What’s the value of this ??

Your carb has value as a core and easily double that if professionally restored which will cost you big dollars. If you are going after the big bucks, you will need to find someone that is restoring a numbers car that needs that specific carb. If I was doing that I would look for a good core and send it to my carb guy and not rely on someone else's work or worse, a spray can rebuild with a new kit. Put it up for sale as a core, capture your profit and go on with life.