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Walking into Costco for the first time can feel like stepping into a completely different kind of shopping experience, and for one Reddit user, that moment was right around the corner.

In a post on Reddit, the shopper shared they were about to sign up for a membership and wanted to make the most of it. Their goal was simple: save money, avoid overwhelm, and figure out what’s actually worth buying in bulk.

What followed was a flood of advice from seasoned Costco shoppers, and a clear theme quickly emerged.

costco store — Image Credit: Deposit Photos

“Don’t Buy What You Don’t Need”

If there was one piece of advice repeated over and over, it was this: self-control matters more than the deals.

Many Reddit users warned that Costco can quickly turn into a spending trap if you’re not careful. One commenter put it bluntly: buying unnecessary items can wipe out any savings you thought you were getting.

Others echoed the same idea, stressing the importance of walking in with a list and actually sticking to it. Without one, it’s easy to justify impulse purchases simply because something seems like a good deal.

Why Bulk Buying Isn’t Always Cheaper

While Costco is known for bulk savings, several shoppers pointed out that bigger doesn’t always mean better.

Some noted that certain items, especially produce or specialty foods, can actually cost more per unit than at regular grocery stores. Others said they’ve bought large quantities only to realize later they couldn’t use everything before it went bad.

One user summed it up well: bulk shopping only works if you’ll realistically use what you buy.

The “Overwhelmed” Effect Is Real

For many first-time shoppers, the biggest challenge isn’t pricing, it’s the experience itself.

Commenters described Costco as overwhelming, with constantly changing inventory and massive quantities that can distort your sense of scale. It’s easy to underestimate just how much you’re putting in your cart until you reach checkout.

Some even suggested treating your first visit as a “scouting trip,” walking the store, comparing prices, and leaving without buying much at all.

Timing and Strategy Matter More Than You Think

Beyond what to buy, Reddit users also shared practical tips for shopping smarter.

Going in with a full stomach was one of the most repeated suggestions. Shopping while hungry, many said, leads to overspending, especially in a store filled with snacks and ready-made meals.

Others recommended visiting during off-peak hours to avoid crowds and learning the store layout over time rather than trying to navigate everything in one trip.

The Unexpected Favorites Everyone Mentions

Despite all the cautionary advice, there were a few items nearly everyone agreed on.

The famous $1.50 hot dog combo came up repeatedly, along with the popular $5 rotisserie chicken, both considered unbeatable deals. Many also praised store-brand essentials like paper goods, cleaning supplies, and over-the-counter medications for offering consistent value.

These, shoppers said, are where Costco tends to shine the most.

The Bottom Line

For this first-time shopper, the takeaway was clear: Costco can absolutely save you money, but only if you approach it with a plan. Without one, it’s easy to walk in for a few essentials and leave with a cart full of things you didn’t actually need.