I was going to one almost every weekend just to see what was selling and prices.
And I think that's the value to be obtained there for sellers like us. I have a friend who has two stalls in an antique mall and he went there after having a stall in another place that went out of business and then after that, having opened his own full store (and subsequently closing it).
He says the antique business in our area (central California) is dead, but he soldiers on with his current approach. He and I buy on a picking basis and often compete for the same goods though he deals more in vintage stuff than I do and we often tip each other to things the other person likes.
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So, the use of antique malls to see what things are selling for (there) certainly has value. Personally, I don't want to be in a brick and mortar situation. Too much overhead and time and lack of freedom. If you don't need to go that route, why go there. The virtual stores of eBay and Craigslist are enough for me.