http://spacenews.com/in-orbit-services-poised-to-become-big-business/ This seems like a very good idea. If a satellite fails in space then it's likely the main bulk of the unit is probably fine. If you could replace a battery, top up the fuel, replace a motherboard or a few solar panels. Then you could potentially extend the life of the unit with only a minimum payload from earth. At the moment, like with rockets before SpaceX made them reusable, when a satellite fails it is destroyed. Which is a bit like pulling down a building when the first owner moves out. These floating bits of metal in orbit are space real estate. If what's inside fails then why not let a new person make use of the space. Top up the fuel so it can move about for longer, replace any sub-par solar units with new modern ones, swap out the electronics with new parts and replace then batteries with new longer life units. Potentially you could have a new working system up and running for a fraction of the cost.