Sounds like someone with a poor grasp of law yet are a self proclaimed expert!
Generally, advertisements are not offers but invitations to treat, so the person advertising is not compelled to sell. In Partridge v Crittenden[1968] 1 WLR 1204, a defendant who was charged with "offering for sale protected birds"—bramblefinch cocks and hens that he had advertised for sale in a newspaper—was not offering to sell them. Lord Parker CJ said it did not make business sense for advertisements to be offers, as the person making the advertisement may find himself in a situation where he would be contractually obliged to sell more goods than he actually owned.
A display of goods for sale in a shop window or within a shop is an invitation to treat, as in the Boots case,[3] a leading case concerning supermarkets. The shop owner is thus not obliged to sell the goods, even if signage such as "special offer" accompanies the display. Also, If a shop mistakenly displays an item for sale at a very low price it is not obliged to sell it for that amount.[4] For an offer to be capable of becoming binding on acceptance, the offer must be definite, clear, and objectively intended to be capable of acceptance.
