humm, are they the latest m4's? or the ones with the odd sizes pistons?
i have the original m4's, before i accidentally contaminated my front pads they became a little weak, but before the ramp of the power was perfect for me (ive had a go on v2's, they almost killed me with the sheer power, but have had a go on the latest m4's as well, felt totally awesome, much better then mine)
i have the new M4 ones well 2008-9 ones not the techs one before them haha. im wanting the V2s when ihave the cash lol first im getting Red floating rotors from hope.
i would sell them for £160 pair? 80 each ? i think thats an ok price lol if i was to sell them but I have recently had to change my inshurance on a car and it has cost me loads so wont be updradign thoes brakes any time soon mate haha