Last winter, when SU had their 777s parked at SVO, some were wondering if these would be the first second-hand 777s on the market. Now it looks like the ones of Air Europe will be the first to find a new operator.
As for their life-span, it is mostly determined by the ability of the airplane to make money for the airline. The 777 looks like it will be able to do that for quite some time. At least as long as the -10s. The life-span of the A332 will come close to that too.