I think a lot of 'em sold it via shows an' Gunbroker/other online venues. I know at the last show, there was quite a bit of ammo up for sale with markdowns, but not many buyers.
i was told by a local gun shop owner that he has a constant supply of .380 and hides it all so when customers come in he can say he only has a few boxes left and is able to sell it for a premium price good thing is he was cool and sold me some for a decent price. so im assuming the scarcity of .380 is quickly fading.