Costco's famous $1.50 hot dog hasn't budged in decades, but plenty of other prices on the warehouse floor move around all the time.
That's why seasoned members walk the aisles with a mental list of what's actually worth buying right now.
A few categories are quietly offering some of the best value of the year.
Start in the pharmacy and optical departments, where you don't even need a membership to shop.
Prescription prices at Costco's pharmacy consistently rank among the lowest in national surveys, and the optical center sells glasses and contacts for well under what most stand-alone shops charge.
If you've been putting off new frames, this is a rare spot where the savings can top a hundred dollars on a single pair.
Bulk frozen shrimp, wild-caught salmon, and frozen berries tend to run 20 to 30 percent cheaper per pound than grocery store equivalents, especially when you compare the cost per serving instead of the sticker price.
The catch is storage: if your freezer is already packed, you'll lose more to waste than you save.
The rotisserie chicken remains the undisputed champion at $4.99, and it's still roughly the same price it was in 2009.
Costco reportedly sells them at a loss to get shoppers through the door.
Pair one with a bag of the $5.99 Kirkland mixed greens and a $4.99 bag of dinner rolls, and you've got dinner for four for under $16.
When Costco slashes a price to clear out an item, the tag ends in .97.
That's a manager's markdown, and it usually means the product is about to disappear from shelves.
Tags ending in .00 or .88 are also worth a second look, often signaling a one-time buy or a discontinued item.
Kirkland Signature paper towels, toilet paper, laundry detergent, and coffee regularly beat name brands in blind tests and per-unit price.
A single Costco run for these basics can replace three or four trips to a regular supermarket, which matters when gas and time cost money too.
One caution: not every bulk buy is a bargain.
Fresh produce can spoil before a small household finishes it, and some snack multipacks cost more per ounce than sale prices at your local grocer.
The winning strategy is to know your per-unit math before you fill the cart.
Finally, check the coupon book, which Costco now calls its "monthly savings" booklet.
The discounts apply automatically at checkout, so you don't need to clip anything.
Stack those deals with an Executive membership's 2 percent annual reward, and the savings compound quietly over a year. **The bottom line:** Costco rewards members who shop with a plan rather than a list of impulses.
Focus on the pharmacy, freezer section, rotisserie chicken, and Kirkland staples, and skip the produce you won't finish.
Final Thoughts
Do that consistently, and the membership pays for itself several times over.