What makes something Valuable? Why might people disagree over why an object is valuable?

Well personal experiences and opinions tie into everything. So if you grow up with a teddy bear, that teddy bear is valuable to you because it brings you the nostalgia of your childhood.

Or something is valuable if the object is almost out of stock (such as the toys before Toys R Us closed), it is hard to find (such as diamonds and other minerals), and/or the object toke a long time to make (rings, necklaces, clothing)

Some people disagree because everyone is different. Not everyone had the same childhood or experiences as you have.