But what does that mean? - is that really all that shopping online has to offer?
It means different things to different people - to me it means that driving to buy a new high chair this weekend, an 80 mile round trip, would cost more in petrol than the postage John Lewis would charge me.
I don't know what the tipping point is, but for me it is here - shop online - it is cheaper than driving, it is greener and far more convenient.
So at least now I have a new answer.
Next time my parents ask me i'll say "it is cheaper than driving".