- if they carry something that is sold elsewhere (e.g., a "regular" grocery store, they're price-competitive - often beating Giant or Safeway on those items).
- if they carry a local product from, say, a farmer/producer that sells in the local farm market, their prices are the same (unless the seller at the farmers market intentionally undercuts Whole Foods' pricing
- they're a skosh higher than, say, Total Beverage on same-item-pricing for wines and beers
- they're about the same as Wegmans on items from the dairy-case, seafood counter and butcher's counter
- You get positively KILLED on things like prepared foods (though, the ingredients on one of their sandwiches tends to be different than the ones you'll find a Potbelly's or Jimmy Johns ...and in a completely different class than your local Subway)
- You get killed on vitamins/supplements ...but they're usually carrying brands/options for which there's no meaningful point of comparison
Note: I made the shoe comparison b/c it's fair (see Leather Grades article)