VoodooDolly: I agree that a busy thrift store would help our traffic but since an antique mall is mostly a 'destination business' would that thrift store traffic result in sales?
I think that it will indirectly increase your sales. Like I initially posted, it will increase traffic for sure. Out of that increased traffic, I think you're going to see a steady, small trickle of small purchases. I also think that, like someone else pointed out, the thrift patrons will tell people about your antique mall -- you're going to be seen and talked about, free advertising. Word of mouth is what gets me places more often than not. I can drive by a place a hundred times without going in, but if a friend or neighbor has been there and tells me it's worth the trip, I generally check it out. More people = more sales.