Rhythm Thief said:
This may well be true, but the manager's attitude was still inexcusable. And it's not doewn to extra training or education: simple good manners would do it. Sadly, they seem to be more and more scarce these days.
Contract law doesn't change if the manager is an arse

...and yes, even if they were not going to sell it for the lower ticket price there is a way of going about it.
Crankarm said:
It's nothing to do with contract law. There is a statutory duty on a retailer to ensure that it's prices are not misleading. I refer you to my earlier post #7.
When purchasing something in a shop you start with an invitation to treat. This could be an advertisement or display of the goods. In law, retailers do
not offer to sell.
Now, an invitation to treat means that an offer (or contract) has not been formed. So, if a price is incorrectly marked the sale of the goods can be refused by the retailer.
Now (hypothetically), if for instance the retailer had to sell an item at a ticket price, you would have a problem when they run out of stock that they would be breaking a contract to supply goods. If the shelf said "lovely top £5" and that was an offer (not an invitation to treat, as it is), then the shop would legally have to supply the item. If for instance the item was no longer in production they would be liable against contract law....thankfully the law isn't like this so it's not a problem.
Now, if you take a look at the case:
Pharmaceutical society of great Britain Ltd V boots cash chemists (southern) Ltd [1953] 1 QB 401.
You will see how Boots pharmacy is not breaking the law by having medicines, which require a pharmacist's approval to sell as the contract is made at the till and
not at the shelf (where there's an invitation to treat), so a pharmacist is present at point of sale.
Under your system Crankarm, a consumer could go in a shop, decide what they want to pay, write it on the label, go to the till and be legally entitled to that product at that price. Yes, I'm sure the consumer could be done for fraud or something, but it would be very difficult for the shop to prove.
Another issue, which would have been a major one where I worked. With our sale items marked down price tickets went on the hangers to show how the reduced price. Now, when people tried stuff on in the changing rooms they had a habit of putting the clothes on different hangers, with different price tags. We would not have been legally required to sell the item at the incorrect price as you seem to be saying.
Quick question, if you were in a shop and knew that the item would cost £10...that's what it says on the ticket, shelf, etc...but when they put it through on the till it was £5, would you tell them how the price is wrong and pay the higher (correct?) price.