Have the BIG service coming up this year and been told the by my local honda dealer that to do the plugs are a set price if £200 . It seems honda charge £122.00 for the 4 plugs and £80 labour to fit I guess . They say they use ngk laser iridium spark plugs . But these are listed on eBay from various sellers for anything from £35.to £50 . Are the eBay items likely to be copies ? Appreciate any advice as cox honda have them for £79.00 at the moment!