Shopping at Costco can feel like a guaranteed way to save money, but the truth is a bit more complicated. While the warehouse club offers unbeatable value on some items, other products—from electronics to specialty sweets—might actually cost you less elsewhere. This ultimate guide dives deep into a head-to-head price comparison, pitting Costco against major competitors on categories like toys, appliances, gourmet sweets, and even jewelry. Before your next trip, learn exactly which bulk buys are worth the membership and which items you should skip to maximize your savings.