I'm addition to the reasons in that video...remember that SS will match any in stock deal that another dealer is offering.
SS usually has the lowest prices you'll find. However, sometimes you'll find a crazy deal somebody is offering. If you live in TX, or prefer to deal with SS for any other reason, just give them a call.
One recent example was a dealer that offered the Ti-Rant 9 for $348.99 and the Ti-Rant 45 for $498.99. Even though SS had them priced at $649 (as low or lower as anywhere else you'd find), I know several members here that called SS and had that price matched.
They keep a copy of my trust on file, and just signed up a new SS Direct dealer within ~35 miles of my house. Previously, the closest was 75 miles away. It's a very painless process to place my order online and then I'm done until I get word that that approval has been received and I can go pick up my latest silencer.