Yep another one who recommends Rapallo, have always had excellent service from them. http://www.rapalloav.co.nz/
try the $2 type stores, they have 1.5 mtr cables for around $7 and 3mtr for around $12 and they are good quality , i have bought my last 2 from one in Rotorua and have had no problems.
Common sense is not as common as you think.
Previously known as psycik
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The 12 or so I got from Dick Smith for 50c each at Xmas should last me for the rest of my life!
At the end of the day what do you consider to be "reasonable"? I think the prices charged by big name retailers such as PB Tech are pretty reasonable.