Damn they are a bit steep! On a serious note, these people do plugs at a great price. Even the QA55V is under a fiver a pop. http://www.sparkplugs.co.uk/pages/database/results-ccp.asp
Is that like someweird shit to check whether it was really Theseus who belted shite out of the Minotaur??
You think ebay is expensive for these plugs try this on Amazon NGK Spark Plug R2349-10 Plugs [Box 4]: Amazon.co.uk: Car & Motorbike They are the ones NGK list for the bike if you wondered