I am a sucker for dishware, and one of the things I collect is square plates. I have a wall of them (well, it's a stairwell, actually), and I'm always on the lookout for them.
Yardsale Bloodbath, a weekly blog about a couple of junkers in Seattle.)
My philosophy about yard sales is this: do you want to get rid of it, or sell it for a profit? If your motives are the latter, then open a booth in an antiques arcade or become a power seller on Ebay. Don't have a yard sale.