The Bee-Commerce prices were actually alot lower than the same items from Mann Lake Ltd., and I ALWAYS compare shipping charges. Some companies may seem lower in an item price, but when you total your purchase including shipping you'll realize that THAT'S were they're making up for the lower prices!
Since my bees are in far N. Wis. and there are no supply houses or distributors nearby, the most convenient physical store-front is Lapp's Bee Supply in Reedsville, Wis. Problem with that is that it's a good 30-45 mins. off the interstate and then I continue north in the other direction, so another 45 mins. or so to catch the interstate going north again, so it's not a very convenient side trip for me. It's worth it to me to pay $10 or $15 to have the items shipped than spend a couple of hours of extra driving time (and now, gas) to make the side trip.
Love that "Beehemoth's Bees" site someone posted here awhile back. It's a search engine that will price compare for you. Alot of the time, you're comparing "apples or oranges", 'cause one company packages items (say foundation) in different configurations, but it still saves alot of time in comparison shopping.