Monitor the pricing. Having it marked”fairly” don’t matter if what you want to do is sell it and it ain’t selling. Don’t get your feelings hurt. Just give as good as you get and laugh. Move around before hand and find a few folks that might be mutually beneficial. They have something you don’t but somebody will probably want, make note and let them know you’ll send somebody their way. Ask for same. Follow thru and ask the customer to mention you. When you come in with the vendor flow be obvious in zip tying your carry gun barrel. With either empty mag or no mag. Here’s a personal choice. I’ll have a live mag hidden somewhere I can lay hands on and a sharp knife to cut the zip with. I’m not walking out of a show with a grand or more and nothing but a smile and kind word to defend myself with. Very doable. Plan ahead.

“When Tyranny becomes Law, Rebellion becomes Duty”

Colossians 3:17 (New King James Version)
"And whatever you do in word or deed, do all in the name of the Lord Jesus, giving thanks to God the Father through Him."