My first suggestion, so please be kind with me :3.

There is 4 of these in the world, and only 2 are on the market.

Sold for 2 Buds - http://www.tf2outpost.com/trade/18354651

Guy with a B/O of 3 buds and a C/O of Cauldron Bubble AA- http://www.tf2outpost.com/trade/18556261

It's effect is a bit lower Tier than smoking and in a few cases it could be quite near.

Please don't be harsh on me, my first suggestion and you may not agree with a little proof ( well since there is only 2 on the market ).

So yeah. Thanks. Byee :3

I came back with proof of sale, hope this is enough.