Curious about this...

Probably the wrong time to post this, because birddog is otherwise preoccupied, but I was just wondering why this is so.
I noticed that camera house in George St. had the Nikon 70-300g for the online price of $219, the shop price is $249 but if I was to buy it online and elect to pick it up myself from the shop, the price is still $219, so what is the difference to just walking in off the street, to ordering online and then walking in?
Not that I'm going to do this, but it just doesn't make sense to me.
I noticed that camera house in George St. had the Nikon 70-300g for the online price of $219, the shop price is $249 but if I was to buy it online and elect to pick it up myself from the shop, the price is still $219, so what is the difference to just walking in off the street, to ordering online and then walking in?
Not that I'm going to do this, but it just doesn't make sense to me.