A couple of helps
I needed some pepperoni at the deli counter. Their already sliced (small) was least expensive. It was fine as I just needed it for a salad. If they slice from larger, it was $1.50 more per lb., and the prepackaged was even more per lb.
In Staples, read a sign that they pay $3.00 for empty cartridges from HP, Lexmark and a couple others.
Every little bit helps.