Question juridique clé
Whether the buyers could recover the purchase price plus interest from the date of payment after rescission.
Solution extraite
Yes. Rescission under Art. 109 OR has ex tunc effect for the repayment claim, so the purchase price was due back from payment date with interest.
Motifs extraits
The court held that restoring the creditor to the position as if the contract had never been concluded necessarily gives the rescission retroactive effect; any benefits actually derived from the land would only reduce the negative interest if proven.