How do I haggle politely with a flea market vendor?

Start by being friendly and showing genuine interest in the item. Ask a question about it, then ask something like "Is this your best price?" or "Would you take a little less?" Most flea market vendors expect some negotiation, and a respectful tone goes a long way.

Make a reasonable offer rather than an insulting one. Offering a modest discount below the tag price is common, while cutting the price in half on a fairly priced item can end the conversation. Bundling several items together often gets you a better overall deal than bargaining hard on one piece.

Have cash in small bills, and do not keep negotiating after the vendor agrees to your number. If they decline, thank them and move on. Vendors remember courteous shoppers, and you may get a better offer when you come back later in the day.