As one of its daily deals, Staples offers the Keurig Coffee People Original Donut Shop Regular Medium Roast K-Cups 24-Pack for $12.99. Add two to your cart for $21.98 and apply coupon code "29468" to cut the price to $17.58. Plus, Staples Rewards members bag free shipping. (Not a member? It's free to sign up.) That's $0.37/K-Cup and the lowest total price we could find by $17.
Looking for a different flavor? Staples also offers two Green Mountain Coffee Dark Magic Dark Roast K-Cups 24-Packs for $17.58 with free shipping via the directions and coupon above.