If you walk into any retail electronics store to buy any type of cable, I can almost guarantee you are paying too much.
If you go to bestbuy.com, and search for any cable needs, and then compare the price to monoprice.com or eforcity.com, Best Buy loses the overwhelming percentage of the time.
I have personally used monoprice.com many times, and even recommend it by word of mouth to everyone I know when they mention needing any cable type item.
I have saved quite a bit of money by using these sites since 2006 for my personal use, and for friends and family. The difference has been quite dramatic in my experience $80 vs $5 even w/ shipping has been a common comparison.
I'm sure some of you are already aware of the huge retail markup on many cables, chargers, and adaptors. For those of you who habitually walked into Best Buy and bought your items, maybe you will like the other options.
Spending an extra $75 dollars on a brand name cable for a digital signal (like HDMI) is a big waste of money.
Put that in your Roth IRA instead!