what is left as they know that they will be able to get it at very low prices.
if you take away the close time then buyers have less bargaining power as they don’t know your desperation to sell off what’s left because for all they know you’re sale could go on for another day.
even if you do this, customers may ask when you are going to close. “when it’s all sold” should be your answer to this. so you give the impression that you won’t be giving anything away later.
if you do give a close time in your garage sale flyer, then you can be prepared for the last minute 