Lovely car obviously very loved and cared for.... but unless you find someone that was going to buy a 2002 car and spend 12k doing EXACTLY what you have had done to the car then you are very wide of the mark.
GLWTS but I think you will have to go down the route of stripping the car if you want anywhere near what you are asking.
I think its pushing it to get a decent 2006/2007 GT for that money, but not that far off...
Stuff like brake discs, clutch/fly etc are a no win, unless they are UBER expensive they add bugger all to the value of the car as they are consumables at the end of the day.
Why are you selling can I ask, seems like you have spent a huge amount of time and put a lot of effort into it, can you not hold onto it rather that lose a lot of what you have put into it?