The definition of cost is: the amount paid or charged for something.
The definition of value is: a fair return or equivalent in goods, services, or money for something exchanged. and/or relative worth, utility, or importance
These are two very different things. One is what you pay up front for a particular good or service and the other is the worth to you in the long run.
Let’s not confuse one with the other. Just because you can find the same product (same is relative until we look at the details) that costs less, doesn’t necessarily mean you have struck gold and will be happy.
If the value of that product doesn’t fulfill your expectations of how it performs for you, you will be greatly disappointed.
Sometimes, the cost will be more than other companies are selling similar goods for (again we can look at the details that may be a bit different), but the value to us is much greater because it fulfills our expectation of what that particular product can do for us.
Let’s remember that just because it’s the cheapest, doesn’t mean it’s the best for you. Especially when value is important.