In cash

If the seller is seated in the same city/settlement or if you happen to go to the place where the seller is located, you may also deliver the goods in exchange of money in person.
That will conclude the transaction and you will become the owner of a new product!
No transfers and no concern about whether the money reached the target or whether the goods will arrive in time.

If the buyer has paid by cash or bank transfer, this can be confirmed by the seller at the time of the transaction by going to Dashboard > Successful auctions > selecting the correct item > mark the item sent first > then you can mark whether it was paid by cash or bank transfer.