So read the sign in front of my house; in fact, a picture of last year is this:

The good news is, I was delighted when the realtor called saying we had an offer. "Looks good," I texted after she'd emailed it to me. The price was $3,000 less than our asking price but I knew to expect it.

The bad news is, the realtor talked me into countering with a higher price. The realtor on the other end did not counter offer; instead, he said he would show his clients some other places on the market. 

The lesson: Don't be greedy. A bird in hand is better than two in the bush.