When I decided on which model of GPS I wanted to buy, I searched around online for the best price.  The best I could find from a reputable online only retailer was $149 - from Amazon.  I then searched around for prices from stores I could pick up from...including Walmart, which as luck would have it, was selling the same unit for only $134.  I thought that was great, since I could get it immediately.  So, I went to the Walmart closest to me, but they didn't have it.  They are kind of a Walmart and a half, but not a full blown super duper Walmart.  So, I went to the SD Walmart on the other side of town, and sure enough, they had the unit.  Only, instead of $134, it was priced at $169.99.  After managing to get the counter guy to help me, I asked if I could get the item for the price posted on the web site.  No was the answer, followed by a rambling of other garbage including "different supply sources", "shipped out of Texas", and blah blah blah.  Whatever, not worth arguing about, so I just left.
I decided to check Circuit City just for the hell of it, 'cause I didn't figure they'd be selling it, and if so, I didn't figure it'd be at a decent price.  Wonder of wonders, they do sell it, and it's on web-only sale for $144.  Of course, with Circuit City, web-only doesn't mean you can't get it from the store, it just means it's extra convenient to get it from the store.  I ordered it online with my CC, selected in-store pickup, and had my new GPS waiting for me when I dropped into the store an hour or so later.
Moral of the story?  I like pizza.  Also, Circuit City has the biggest friggin' receipts I have EVAR seen!  I think an acre of rainforest and a thousand species of stinkbugs no one has ever seen had to die just so I could get a receipt from 'em.  But still, pretty neat setup with the online order / in-store pickup.  Oh, and Walmart blows.