Summer sale season is upon us, and Amazon Prime Day kicks off on June 23 this year. But before you hand Jeff Bezos your entire paycheck, know this: Costco is expected to return with its Member Savings Days event around the same time, plus all of the wholesale retailer's regular price slashes. Because nothing says 'summer fun' like competing corporate discount events.

Costco, as you may vaguely recall, is a membership-based wholesale retailer. Non-members can shop online with a guest account, but only members get the full savings - non-members get a 5% markup on purchases, and some deals are members-only, because nothing builds community like paywalled discounts. Memberships start at $65 a year, though you can sometimes find membership deals if you're patient and willing to hunt.

Your humble narrator is a card-carrying Executive Member and frequent Costco shopper, here to help you sort through the sales and find the best deals. Among the highlights: the TP-Link range extender, which ZDNET editor Cesar Cadenas recommends for budget-friendly Wi-Fi coverage in apartments or small homes - because your router shouldn't require you to sit in the laundry room.

The LG C5 OLED TV offers stunning picture quality and a sleek, minimalist design, according to our reviewer. And it's on sale, because the only thing better than a great TV is a great TV that costs less.

ZDNET reviewer Jack Wallen tested the Liberty 5 earbuds and wrote that you'd be hard-pressed to find a pair capable of creating a well-defined, personalized hearing experience and producing such energetic, detailed sound at $129 - let alone for $50 off right now. So you can hear your own existential dread in high fidelity.

Also making the list: an Anker charger bundle with a 70W 4-port GaN charger, a 30W USB-C GaN charger, two durable 6-foot cables, and cooler, safer charging with GaN technology. Because your devices deserve to charge at the speed of light while staying cool as a cucumber.

The PlayStation DualSense controller works with PS5, PC, Mac, and mobile, and comes with a charging base - so you can keep playing without the existential horror of a dead battery mid-boss fight.

The Oura Ring 4, our pick for best smart ring you can buy, is now discounted since the Ring 5 just launched. It's a great time to buy the older model, proving that in tech, being last year's model is a virtue.

ZDNET TV reviewer Taylor Clemons says the Samsung QN90F is a solid buy if you want high-quality picture and audio without springing for a more expensive OLED. It's the budget-conscious adult's way of saying, 'I have standards, but also a mortgage.'

And for the soundbar enthusiasts, there's a Sonos Beam bundle with a $40 Apple gift card, a $49 wall mount voucher, and a 30% off Sonos accessories coupon. Because nothing says 'immersive audio' like a pile of vouchers.

This year, Amazon Prime Day runs from Tuesday, June 23, through Friday, June 26 - previously held in July, because consistency is for amateurs. Costco is expected to hold a Member Savings Week sale to compete, plus its usual monthly price markdowns.

As a ZDNET editor, I only cover deals I'd actually buy - our team looked for deals at least 20% off or rarely on sale, using price comparison tools and customer reviews. The goal is to help you shop smarter, because the alternative is buying a $500 blender you'll use twice.