You can buy and sell Smoke tokens for pretty cheap on Hive-Engine.com ...
No fees either.
Hive-Engine.com : https://hive-engine.com/?p=market&t=SMOKE
You send your Smoke to and from Hive-Engine by sending to @Smokelink with your Smoke username in Memo. Always try with small amount to make sure you don’t make any mistakes.
Update: Smokelink seems to be down..... stay tuned. Waiting to hear from @yehey