Product review (5 stars): Good, Long, and Cheap=awesome
10 Foot of quality wire and plug for $18.  What more could you ask for!

1.  No store locally would sell something like this.
2.  IF, and that's a big IF, you did find a store after hours of searching that sells a 10ft cable you're going to pay $30+ at least for it.

So if all you need is a standard 4'-6' cable... and want it quick you can find that anywhere.  But for some reason you need the longer one...this is your best bet.