Imagine a scenario and this is a real life one. How many times have you gone to a shop and bought an article like a dress or TV or phone because you either instantly liked it, or it was discounted or the shopkeeper said it was going out of stock. Now in each case, how many times have you got back home post purchase and found out it was available cheaper elsewhere. Maybe online, maybe a friend told you or maybe a bigger discount was coming up. Iam sure it must have happened a few times to you all