Self-cracked and damaged leather what to do and for what price?

Hello, I would like to have information on the renovation of my leather seats which are cracked and damaged, the car is 10 years old, it is a beige dakota leather of a bmw 5 series e61, it is at least for 2 full front seats at the start.I would like to know a little bit about the prices to be able to really give a second youth and that the cracks and colors are as new again.I think I can pass the leather repairer of the site, on the other hand, I'm afraid for the color afterwards, I'm afraid to make a mistake of variant to recolor it and make a mistake, so if I would like to know if you have rates also to do the work by a professional and therefore have quotes, I'm from the Lyon area. depending on the prices, I would look for used electric seats from the bmw e61 in much better condition directly.