Keep it legal. No real-steel weapons unless deactivated, parts are fine. Know your local laws.

Mark your merchandise as Wanting to Buy (WTB), Wanting to Sell (WTS), or Wanting to Trade (WTT).

And have contact info available, as well as a current picture of the actual item.

This is solely for people to advertise their stuff and make contact. Any known scammers though will have their account deleted without warning, and possibly reported to authorities.

Happy dealing here at the Black Market.