Was looking around at 27" monitors and I found this one. It seems like a good price especially for the resolution (I haven't found any other cheaper from a reputable seller - Korean knockoffs from ebay don't count).
It's essentially a cheaper version of the BenQ BL2710PT which costs a bit more: http://www.amazon.co.uk/BenQ-BL2710PT-Monitor-USB2-0-USB3-0/dp/B00DZFPIOU/ref=pd_cp_computers_3
They both use the same panel though I believe, it's just the build quality may differ and also the colour settings too.
It's not the lowest it's ever been however, but it could be the cheapest around at this point.