Sometimes it is just a matter of looking around.
We went for a walk and on the way back noticed a garage sale was being set up. We went back the next morning (when the sale was on) and scored 2 external frame packs (a Kelty and an REI) for $5 and $7. I also got an electric tea kettle for 75 cents.
One thing we left behind was our grill. We brought the propane tank, but a grill is hard to move! We thought it would be easy to turn up a replacement for free, but so far it hasn't happened. But, as I was walking home from school today, I spied a nice big red Weber grill with a free sign. It even had a mostly full bag of briquets and a chimney thrown in! Score!!