Not sure that is fair. I doubt Aztec are set up to be, or ever intend to be, the kind of place that Mouser is. Aztec probably carry some common parts as a convenience to their customers. For example by analogy, one would not expect to pay the same for a quart of milk at the local gas station than at the big-box grocery store, but by the same token, you might not be able to get your gas at the grocery mega-plex. Aztec do sell things that Mouser just do not. As for shipping, their $5.00 verses Mouser's $4.99 does not seem to be out of whack. They both offer free hipping over $200 as well. Even still, that cost on that LM35 not withstanding, how many people are likely to go to Mouser for a single LM35 and pay $6.20 for it?