No Ian I’m correct
The ‘consideration’ is clear if the price is agreed and someone has agreed to sell that for that price and the person has agreed to buy it at the price verbally
Yes, I believe Stuart is correct - although the final component, a mutual intention to be bound, could be argued to not be present if the seller always intended to sell to a higher bidder if one came along.
In any event, it's very poor form. A chap's word is his bond. Clearly the seller is no gentleman.