Amazon offers Prime members the Mead Wide-Ruled 70-Sheet Spiral Notebook 4-Pack in assorted colors for $6 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $7.57.) That's $1.50 per notebook and $4 under the lowest total price we could find for this quantity sold separately elsewhere. Each notebook is 3-hole punched.
Note that the colors will be chosen for you at random.