The US doesn't export the family jewels. Most likely they'll be fitted with export-centric Radars and sensors, as was the case with the Indonesian transfer that this is apparently based on.
The US is rapidly retiring the F-16 at a rate of about 200 a year. The older ones are going to be converted to QF-16 target drones or dismantled and sold for maintence parts to foreign users. The newer ones (the ones with fewer flying hours used on their airframes) are / will be either wrapped up and stored away in case the country needs more fighters in an emergency, or, as is the case here, sold to foreign allies.
The stored ones are not the ones in the desert. However it should be noted, that if preserved, even the ones in the desert will be good to fly if needed. Not all of them are intended to be stored in that condition (many are raided for parts), but the ones that are preserved can be fairly easily returned to services.
The Air Force "regenerated" a B-52H in 2014 to replace a damaged B-52H. It was wrapped up and sitting outside for a decade, but is in service now. Chances are they'll regenerate another one to replace the one that crashed two weeks ago in Guam. There's 13 more in storage.
This is what properly stored aircraft looks like. This is the aircraft they reactivated, pre-restoration.
It was sealed. Anything that happens on the outside is literally skin deep and easily repaired
There are hundreds upon hundreds of F-16Cs in storage. With 900 more currently in the active fleet, all of them to be retired between 2024-2026, the Pentagon is basically giving ones in storage away for free.
Ocassionally though, there are high winds... and these being aircraft that want to fly... well... accidents happen.
Bonus round: The F-117s are back in their original Climate-Controlled hangars with their wings removed.
Most of them anyway. Turns out, some of them are still secretly flying.
They may be largely obsolete compared to the B-2, F-22 and F-35, but they're still remarkable to look at.