I but non-locally when I can't get what I want from local sources or unless there is a *huge* price difference after accounting for shipping charges. Given my preferences in bike equipment, I am able to get most things at Jim's shop since he stocks the kind of stuff I like (unlike almost every other bike shop in town, most of which are devoted to the Trek, Specialized and/or Cannondale product lines for bikes and accessories). But there are a few odd things I buy from sources Riv (e.g., clothing items, Phil hand cleaner, and some other bits and bobs).
That's an order packed about every 8 minutes in an 8 hour day. Holy Smokes!
And YAY for Rivendell *having* 60 orders a day to send out!!!