I just had a 1-day 8-hour garage sale last Saturday. Turnout wasn't as great as I hoped as I advertised extensively (multiple Facebook comic groups, craigslist and our Nextdoor website (28 neighborhoods). Sales still weren't bad for 8 hours....about $500. Here's my setup:
I'm actually going to leave our garage setup like this and I'll have more sales about once each month. Like Blob, I threw in my 12,15 and 20 cent beaters in the dollar boxes. One of the first guys to my sale bought $180 worth of $1 and $2 books and most were the lower grade older books.