A quick and clever mindreading trick!
Show your spectator five cards.On one side there are products with magical names.On the other side are bar codes, which are all the same.If the cards are on the table with the bar code sides up, it should be impossible to tell them apart.Yet when you ask your spectator to secretly choose one of the products while your back is turned,you always know which product was chosen!And yes, this can even be repeated immediately with a different outcome!
For this bargain price, this should be in your arsenal of tricks!
And that's all you need!