I don' t know about buying WC as I make my own and won' t pay that big a mark up. But there are other manufacturers around that also make quality strings for a fraction of the cost. I haven' t used any others but have been hearing alot of good about Prostrings. I believe their site is at
http://www.prostrings.com/ . There have been other threads here and on ArcheryTalk about other manufacturers and also on saving on WC. Others will be able to help you more but this was just another option.