49. Seller's right to avoid contract.

Where goods are purchased at an auction1 by a person who has entered into an agreement with another or others that the other or the others (or some of them) will abstain from bidding for the goods (not being an agreement to purchase the goods bona fide on a joint account) and he or the other party, or one of the other parties, to the agreement is a dealer2, the seller may avoid the contract under which the goods are purchased