I think they should be auctioned off on ebay. They could be "disarmed" to the USA's satisfaction. There are F104's (Starfighters), & Lightnings to name a few, in private hands, so I cant see the yanks getting too excited by a few clapped out A4's in the air on a weekend. Can you? Seen a MIG 21 recently in the states also flying. Anything has to be better than seeing the things go rotten on the ground. Cant see it would would take 2 - 3 million each to get airworthy (not war ready) either. NZ$1 million tops.
Keep'im flyin'