Shavua Tov. A major section of פרשת בהר were discussions concerning money matters. Aside from the laws of the Sabbatical year, there was also a discussion concerning ancestral property returning to its original owner at יובל, the jubilee year.
The Gemara in בבא מציעא discussed a special rabbinic enactment meant to protect the consumer. They ruled that a transaction was not finalized with the payment of money. It was only completed when the object purchased was actually delivered.
The Rabbis were concerned that the seller might not be careful to protect the merchandise like he should, since he was already paid. The purchaser had the right to withdraw from the deal even after paying for a specific item.
Learning such laws make us appreciate the wisdom and concern for כלל ישראל on all levels.