.177 crosman pellet price ebay vs walmarts

so I been shootin like crazy and was thinkin I would buy a big box of 1250 count crosman domed pellets off ebay. the price is $28 shipped but to be honest I been using the crosman 7.9 hollow points for plinking and they work great and I can buy them at the local Walmart for $ 6.47 for a 500 count tin. so to me it makes more sense to just keep going this route and buy 3 at once and have more for less. seems funny ebay isn't cheaper but maybe its because they are not hollow points but are the same weight?