[mistercow]

> Yes, but no one stays at a yard sale for more than 2 or 3 minutes

That would be an exceptionally short visit to a yard sale. No way do you actually manage to buy something in less than 180 seconds.

More likely, they'll be there for 10-15 minutes. That's still too short for a tow truck to come, but it's not too short to be an inconvenience.

[vollmond]

Of course, most people don't buy. At least for me, I probably only buy something at ever 4th or 5th yard sale I go to. It's easy to walk in, scan the tables, realize there's nothing of interest to me, and leave.

[donatj]

Yep, that's 90% of people.