Id expect yourself if you don't put lots through the wholesaler to still get the down to £300 , you will be bled dry if you dont get them down on price, Ive just get a quote for SWA for £570 but using my shoulder of bartering Ive just get that down to £480 and took 10mins to do, if you just accept what they offer you'll find competition is hard and once they know they can fleece you they will try and try again..
Id offer the board at £250 and you may get lucky but you can surf the net and get them for around the £300 mark without trying so don't expect a mad rush.