Feelers Dura Ace 7800 Groupo with BB30 Specialized Crank

I am thinking about getting a new groupo for my road bike. I have 7800 Dura Ace Sti shifters, brakes, Front and Rear Deraiiers, Specialized BB30 172.5 Cranks. Everything is in really good shape. Any interest? In complete set or pieces and parts?

How many miles and how old is rear der? ? Scratches , conition?

Around 4-5k miles. Few scratches on the rear der but everything works great.

matt thanks for getting back to me Putting together a new bike so I probably will just go with new or something with less then a 500 miles or less if I can find.