I just did a Google search and there's not a lot out there on the .380 stuff. Any of the auctions or sales I could find ended around $20 after shipping was included. The stuffs pretty rare but that doesn't always mean valuable...

Most collectors will be looking for stuff pre WW2 and earlier. I'm not a ammo collector so I could be wrong but ammo that new just isn't old enough to be worth much. Sit on it for another 50 and your might beat inflation...