Can a carpet store take carpet out of some one home and sell it to some one els and put it in there home? No this is not a joke!
In the US--Usually, the carpet they remove when they replace it with the new carpet is discarded. If the owner of the home didn't care to keep it, the carpet store could take it with them. They could resell it and install it somewhere else if they found a buyer. But if they are selling it as new, and it is not, they could be sued for fraud. Some states may have specific health and safety laws prohibiting them from reselling the carpet, but I don't know of any.