My OH has just come back from our local Woolies having spotted that these are advertised instore as 'Buy one get one free'. Went through the till fine & the reciept has "***2nd free on KNEX toys***".
THERE IS NO SIGN OF THIS SAME DEAL ON THE WEBSITE (DIRECT LINK FOR INFO ONLY).
(This is a the same 325pc tub (275 +50 'bonus' pcs) that was posted earlier in the year as a reduction from 30 quid down to 15 & as a buy one get one half price)
I've changed the title & availabilty to reflect that this does seem to be available online as posted below....thanks to those that have posted to point this out.