|playing sushi restaurant - the Fisher Price house is the cash register|
Because here's the thing: their style might not be my style, so even if they have a mirror for sale and I'm in the market for a mirror, chances are that it's not the mirror I had in mind, but I will buy it anyway because they are watching me.
There's no way to window-shop discreetly at a yard sale. When you pull the car over or step onto the porch, you've declared your intent. To leave without buying anything feels insulting - I can do it, yes, but I feel bad in a way I don't feel in a thrift store where the people who donated the stuff are not sitting there pretending not to watch me.
I've also tried to throw my own sale and make a lot of money which I've heard can be done. Well. It didn't work for me, and it was annoying to donate all that junk that I had carefully priced to the thrift store where I should have put it in the first place. And that's why there is usually a small bag of thrift store donations in my car trunk - I'm not saving them for no yard sale, no how.