The prices on cables and fans for shipping is kinda ridiculous on Newegg. Just bought something and I waited until the optical drive had free shipping before I bought so I wouldn't spend a fortune on shipping. I bought 3 things, a 120mm fan, lightscribe DVDs, and a lightscribe DVD burner. I almost thought I would have to buy a cable with an OEM drive, I did comparisons and the retail drive would have been cheaper than buying OEM and a SATA cable, but I ended up finding a SATA cable lying around, so I went back to the OEM drive.
Buying in bulk helps if you need lots of cables or fans. There's an 80mm fan I bought and it had a bulk buy deal, 10+ fans and the shipping is free and reduced price, so a little over $12 for 10 80mm fans isn't bad. Same deal on select cables. Newegg isn't a great place to buy single cables or fans usually. But then you might end up paying the same amount of money at Best Buy or other places, plus gas money, but you get the cable right away that way... So it may never work out right...lol.