What's the Word?

I was at lunch with my folks today, and I was saying how my kids are too old for a stroller, but too difficult to control some of the places we go, so what I need is one of those wagons. However, they are too expensive! Not more than 5 minutes later we were driving home, and I passed one for sale at a yard sale. First of all, who ever heard of a yard sale on a Friday? Anyway, she sold it to me for $15! What's the word for when something like that happens? Synchronicity!