According to Max Weber, monetary transactions are ephemeral and exclude personal ties. Once a purchase is complete, the link between buyer and seller dissolves. There are exceptions, however, that Weber doesn’t mention (as far as I know).
If a product comes with a warranty, a legal obligation enters. The structural coupling between economy and law changes things by adding the temporal dimension, which is the duration of the warranty.
Without a warranty or a return option, an economic transaction is an event with no duration. It begins and ends in the same moment. The temporal dimension doesn’t come into play.