Little known fact (but not a secret): the F-117 is still flown today, even though they were "retired" in 2008.

https://www.youtube.com/watch?v=AZFwOGfhRZ8

I gather they serve mostly as aggressors and test aircraft - certainly one wouldn't fly that plane into combat. They were never ruinously expensive to operate. The SR-71 on the other hand...