To be fair, I think the guy selling them either got them off the back of a lorry, had a load of free ones from LG or made a mistake with the pricing and honoured it anyway.
Either way, mine arrived today and looks good, the aperture is tiny compared to my i1Display Pro but I am sure it will do a decent enough job after seeing mrk review it.
Postage via ParcelForce Express 24 seems to be about £16 so it looks like they made a £11 loss on the postage alone let alone the calibrator. Still, they honoured it (or didn't notice until they had gone through/shipped) and the postage monkeys just post without looking at the cost.