Here's a good one:
So my wife happens to be running errands near the Radio Shack that has the $12 six foot HDMI cable in stock per their website. I call the store to confirm they really have the part, and they tell me they have three in stock.

So I give the part # to my wife and ask her to pick it up for me. When she gets there, guy searches all over, can't find them, and then tells her they must have been stolen!

Gotta love it! And so, the quest for the $12 HDMI cable comes to an end.