LOL! A guy trying to sell you a random cable. I thought maybe you were going to say the one that was on sale you went and bought it anyway, and miraculously, it turned out it was the very cable your friend needed!

He must have been talking to your inner Tello, who is likely to get things on sale because chances are he'll need it at some point for something. Tellos have to have plenty of everything for when they decide to build or modify something, so their room resembles a somewhat smaller version of Radio Shack.
Welllll, we went and bought a TV at Wal-Mart today. Because that was the first store I went to, and had a look, and the people working in there are helpful enough, sooo, I got one for about $150. And glanced at the HDTV flat panel LCD and plasma TVS, and said, hmm, nice. And then hauled our smallish medium sized tube TV home.
I'd been going nuts trying to comparison shop and read reviews but it doesn't do much good if the ones they have available are different from the ones being reviewed, and vice versa. Said, bah, and bought the first one that looked good for the price. Because they generally last about the same, anyway. I've had cheap ones last me for 10 years, and other cheap ones that lasted maybe... 4 years. Eh.