Reader John writes in with a story about “upselling” at Best Buy. He saw a TomTom GPS unit for $99.99 on sale at Best Buy, so he headed over to the store to pick one up. What follows is his account of how much trouble it was to actually buy the item. We think we counted 9 times that John had to tell various and sundry Best Buy employees that, yes, he was sure that he didn’t want to buy a slightly more expensive model of the same device.