Walmart mostly sells eggs in small packs but also offers bulk options like Costco. However, the price per egg at Walmart is higher than what Costco's 60-count egg cartons offer.
Costco's bulk pricing offers better savings for households that rely on eggs as a kitchen staple, but Walmart's pricing may appeal to those who don't buy eggs in large quantities.
Note that Walmart's bulk availability varies by location, but Costco's supply is usually more consistent. Ultimately, choosing between the two will depend on your shopping habits.