Визначення та Значення "be a steal"

What is the origin of the idiom "be a steal" and when to use it?

The idiom "be a steal" originates from the world of shoplifting or theft, but in the context of the idiom, it does not refer to illegal activities. This phrase is used to describe something that is available at a very low price or an exceptionally good deal that provides excellent value for money.