Best Kids Sales in Grand Rapids

Hi Everyone, 

I am relatively new to the GR area and I was wondering if anyone could give me a suggestion about where the best rummage sales are. I had great luck a few weeks ago with shoes for my 15 month old (after I spent $20 on a pair of sandals for her the day before...) I dont usually like to "rummage" but I cant believe the bargains you can find for kids. 

I heard that Mayflower church has a great one. Has anyone else heard of this one? What about the mom's sale at the DeVoss? Suggestions? Thanks!!