JJ, I set up several 8 foot tables in my driveway and have sales in the late summer usually. I always have one or two people there with me to watch the shoppers and spell each other for potty breaks etc. Mine have alwayds been successful even to the last item which is marked way down rather than take it back inside. But I still make a buck even after treating my helpers to a nice buffet... The last thing I do is put up a sigh over some plastic grocery store bags that reads: Fill a BAG for a Buck. That way all the small junk goes.
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http://charleen-micheles.blogspot.com/