bobbyg81:
Do they have to honor it if you buy it?
If they send it to you before noticing it's the incorrect price then you'e ok, otherwise they will contact you to see if you still want the item so a no lose situation really (apart from the fact you've ordered a Bruce Willis film).
Part of Tesco Terms and Conditions :-
1. 4.
If, by mistake, we have under priced a product, we will not be liable to supply that product to you at the stated price, provided that we notify you before we despatch the product to you. In those circumstances, we will notify the correct price to you so you can decide whether or not you wish to order the product at that price. If you decide not to order the product, we will give you a full refund on any amount already paid for that product in accordance with our refund policy in section 6 below.