I see this argument but wonder how true it is. If I'm shopping around, I'm already being fickle, comparing prices, features, etc. $10 would probably often be

I see this argument but wonder how true it is. If I'm shopping around, I'm already being fickle, comparing prices, features, etc. $10 would probably often be a breaking point. And me finding out you did this definitely would. If anything, it seems one should slightly -lower- prices when suspecting a customer is shopping around.