To be honest I do not appreciate the approach that goes something like this..." I just got a great knife and I only paid $20 dollars for it at xyz site". This is an insult to the Yards intelligence. If you want to show the rest of the Dogs your recent scores and purchases, that's cool because that is above board. Including price and location to buy is cheesy and un-acceptable.
I like telling my family about how they can score the same deals I have, but I can certainly understand your position.