Costco Coupons & Promo Codes for May 2018

Costco offers its members the Oakridge 8x12-Foot Wood Storage Shed for $1,199.99 with free shipping. (Non-members pay an additional $59.99, so it makes sense to get a 1-Year Costco Membership for $60.) That's tied with last month's mention and the lowest price we could find by $369. It provides 728 cubic-feet of storage and comes with a floor kit. Deal ends June 17.

Amazon offers Prime members the Austin Cookies and Crackers 45-Count Variety Pack for $11.99 with free shipping. That's the lowest price we could find by $13, outside of the price below.

A close price: Costco charges $9.49 plus $3 for shipping. (Non-members pay 47 cents extra. It may also be available in warehouse stores.)

Costco offers its members the Bionaire Twin Window Fan for $31.99 plus $9.99 for shipping. (Non-members pay an extra $2 surcharge.) That's the lowest price we could find by $9. It features 3 speed settings, a digital thermostat, and reversible airflow control. Deal ends May 27.

For its members only, Costco offers the Apple AirPods Wireless Headphones for $139.99 with free shipping, that's the lowest price we could find by $19, although we saw them for $5 less a week ago (since expired).

Update: Shipping is now $4.99.

Costco offers its members the Aqua Lily The Pad 17-Foot x 6-Foot Floating Foam Mat for $379.99 with free shipping. (Non-members pay $18.99 more.) That's the lowest price we could find by $81. It's made of UV-resistant foam and can support up to 7 adults (or a max of 1,200 lbs., evenly distributed).

Costco offers its members these Eddie Bauer Men's Trek Shorts in several colors for $19.99 with free shipping. (Non-members pay a $1 surcharge.) That's $24 under the lowest price we could find for a similar pair of shorts and the cheapest Eddie Bauer shorts we could find today. They're available in waist sizes 32 to 40.

For its members only, Costco offers the Lenovo IdeaCentre 720-18ASU AMD Ryzen 7 Desktop PC for $599.99. Opt for in-store pickup to dodge the $14.95 shipping fee. That's $50 under our November mention and the lowest price we could find by $200 today. Deal ends May 20. Features include:

• AMD Ryzen 7 1700 3GHz 8-core processor
• 16GB RAM & 1TB 7200 rpm hard drive
• AMD Radeon RX 560 4GB graphics card
• Windows 10

Costco offers its members the Bestway H2OGO! Double Drifter Inflatable Mattress Beach Bed / Pool Float 2-Pack in Blue/Pink for $26.99 with free shipping. (Non-members pay an additional $1.35.) That's the lowest price we could find for this quantity by $3, although most retailers charge around this price for just one mattress.

For its members only, Costco offers the Lenovo IdeaCentre AMD Ryzen 7 Desktop PC for $599.99. Opt for in-store pickup to dodge the $14.95 shipping fee. That's tied with our mention from two weeks ago and the lowest price we could find by $149 today. Deal ends May 20. Features include:

• AMD Ryzen 7 1700 3GHz 8-core processor
• 16GB RAM & 1TB 7200 rpm hard drive
• AMD Radeon RX 560 4GB graphics card
• Windows 10

Costco offers the Mattel Ultimate Justice League Remote Control Batmobile for $79.99 plus $4.99 for shipping. That's $15 under our March mention and the lowest price we could find by $52 today. It features remote control steering via app, driver POV camera in cockpit, and a special jump mode.

Costco offers the 5.8-lb. Dell Inspiron 15 7000 Series Intel Kaby Lake Core i5 2.5GHz 15.6" 1080p Gaming Laptop for $749.99 plus $14.95 for shipping. That's $8 under our March mention and the lowest price we've seen for this build. (It's best deal now by $215.) Features include:

• Intel Core i5-7300HQ 2.5GHz Kaby Lake quad-core processor
• 15.6" 1920x1080 (1080p) IPS LED-backlit LCD
• 8GB RAM, 256GB SSD
• Nvidia GeForce GTX 1060 6GB video card
• Bluetooth 4.2
• Thunderbolt 3, USB 3.1, HDMI
• Windows 10 Home 64-bit

Costco still offers its members the Case Full Of Seoul Best Of Korean Skincare 11-Piece Set for $149.99 with free shipping. (Non-members pay an extra $7.50.) That's at least $137 under buying most of these items separately; some items are otherwise unavailable to purchase individually from legit retailers. Curated by Korean beauty incubator Umma, this set comes with everything you need to follow a daily skincare routine. Brands in this kit include May Coop, One O Seven, Urang, and I Woke Up Like This.

For more ways you can enjoy beauty on a budget, check out our five best sheet masks for under $5.

Costco offers its members the Wavestorm 8-Foot Surfboard in Sunburst Graphic for $149.99 with free shipping. (Non-members pay a $7.50 surcharge.) That's the lowest price we could find by $38. It includes a removable ankle leash, fin set, and traction pad, and holds up to 200 lbs.

Costco offers its members the Dell Inspiron 15 5000 AMD Ryzen 5 2GHz 15.6" 1080p Touchscreen Laptop for $599.99 plus $14.95 for shipping. (Non-members pay an extra $30.) That's $100 off and the best price we could find. Deal ends May 27. Features include:

• AMD Ryzen 5 2500U 2GHz quad-core processor
• 15.6" 1920x1080 (1080p) touchscreen LCD
• 16GB RAM and 1TB hard drive
• DVD burner
• USB 3.1 input & HDMI output
• Windows 10 Home 64-bit

Amazon offers the Airhead Jumbo Dog 5-Person Towable Tube for $189.99 with free shipping. (Costco charges the same for its members.) That's the lowest price we could find by $76. It measures 150" x 44" when inflated and features neoprene knuckle guards.