Just bought myself a pair of AD700's for £70, brand new off a website. They were listed as B-Stock and apparently it's because they don't come in their original packaging which if they work fine (they should, can return them anyway) is no issue to me whatsoever.
They cost £110 roughly proper brand new, so if it's just the case of a box then I have no issues! :D
Can't wait for them to get here.