Anything with the letters "TAP" on it sells like hotcakes. I have collected up a bunch of it over the years from various dealers, in 9mm, .223, .308, but it is hard to do because no one can keep it in stock for more than few days!
TAP pistol ammo would be like cat-nip for CGN'ers.
I'd also like to try some of the "Critical Defense" stuff. Frontier keeps that up on their webpage in 9mm, but that stuff must have sold out instantly.
Anything with "police", "tactical" or anything similar... you won't be able to keep it in stock.... and I will buy some too

I am not immune to the great power of the Tactical God!