I tend to disagree with the statement that brick and mortar stores are dooming the scuba industry. I personally don't like the idea of sending a regulator to someone that I've never met (and more importantly never checked their C-card) who might be using it "to play around in the pool" with no formal scuba training. What happens if that idiot suffers a barotrauma due to lack of training? Who are they going to sue? I guarantee that my name, the company's name, and the names of the owners of the shop will be on the short list that any attorney will draw up as liable for this persons pain & suffering because we didn't exercise due diligence by verifying beyond a doubt that this person is really who they say they are, with the certifications that they say they have.
If an accurate way of checking credentials before sending the order becomes available, then maybe I'd change my stance.