I've read about ways to get out of it though, as of course companies do not like losing money like that. I think that they should honour it as they made the mistake, but then again if I were a shopkeeper (or suchlike) I'd see it from a different angle.

It seems to be a grey area, some cases the sellers are forced to honour the cheap price, and at other times the purchaser being told that they couldn't reasonably expect to have got something valuable so cheaply.

Bit divided on this one actually.