IDK, sometimes you can find a last year's model at the LBS that is 20% off, but they go very fast and even then you are still paying more than 20% than the BD version if you factor in tax.

Pefromance is about the LBS (though they are a big chain that sells online as well) that gets close. Comparing styles of bikes and components, Performance Bike is closer.

I've been shopping for a comfort hybrid (to ease some back isses I have that get aggrivated by riding a roadie)I found the Jubilee Sport on BD for $349. I wanted something I could sit more straight, that could ride decent on gravel/crushed stone. Comparing that to Performance, the closest bike to that was the Schwin Sierra 1 which is going for $450, so while closer it is still $100 more and has lesser components. If you buy it in the shop you pay tax in most places and that could add another $30 or so and if you ship the bike you have to pay that cost.

So, for this comparison there really isn't a comparison. You could find something closer in price that has narrower tires and things like that but it comes down to taxes and ther right sort of bike. I think even if I took something not quite what I was looking for it would still be a little higher price when adding in shipping or tax. Yeah, you might be able to negotiate but no bike shop is going to be giving you $75-$100 on a $450 bike.

That's not to say I don't buy from an LBS, I have bought probably 30 bikes in my life and all but 4 of them new from an LBS. I have several times paid a little extra due to loyalty my LBS or for the extras they throw in.