Since I don't set up to sell items at petro swap meets anymore, I really can't expand on the original post, that more thing are being stolen than before.
I do remember even as far back as the late 1980s people stealing items from our booth. I agree with DB, it isn't so much the time, it is the people, you just can't trust everyone. Don't put everying on the table, just put examples of what you have.

Jack Sim

Author, 1st & 2nd editions of Gas Pump ID book, 3rd edition is now available at www.gaspumpbible.com
Air Meter ID book also available