BACK TO SCHOOL: Master Lock combination lock (great for lockers) for $3.68 on Amazon (or $3.00 each for a 3-pack).

Amazon has got this Master Lock Breast Cancer Research Foundation Dial Combination Lock in pink for $3.68.  It got 4.4 out of 5 stars over 163 customer reviews.

• Suggested uses, school, employee, athletic, storage lockers; cabinets, for indoor use only
• Durable metal construction for greater strength Automatic locking lever assures a secured shackle when closed
• Cut resistance 9/32-inch hardened steel shackle
• Combination security for keyless convenience

This is an Amazon Add-On item, which means that it ships for free with a $25 minimum order, and its price counts towards that $25.  You can buy multiples of this item to help get you to your $25 minimum for free shipping.  (Other Amazon Add-On item deals can be found here.)

If you need multiple locks, there is a 3-count set of Master Lock combinations locks here for $8.99 with free Prime shipping, which breaks down to $3.00 per lock.