Won't the reserve jets attract a lot of cost for regular maintenance? Since we have to keep them in flyable condition to be able to use them during emergencies. And if there's not an emergency anytime soon, then the costs will pile up over time. Will it not be better if we brush them up and sell them to some other country? Because im sure there still are countries which would be interested in the mig 21s and 29s, if the price is good enough. I'm genuinely curious.
They don't cost a lot, they just sit around uselessly rotting away in air bases devoid of most or all electronics, which are locked up in hangars. When necessary, they are made ready.
Google "USAF boneyard" and check images for more clues.