Be careful, though, as the LBS bearings might be lower grade than the good stuff (grade 25). McMaster-Carr will sell you 100 3/16" grade 25 bearings for $3. They are really specific about spec, plus you can even get fancy things like stainless bearings if you want them. They are really fast. Once I got my shipment in less than 24 hours after ordering (though I do live in Chicago).
Get a couple sizes, get a a fresh bottle of Loctite, and all of a sudden the shipping doesn't seem too bad.