The price of each listing is set by the seller. A buyer can submit an offer for an amount they are willing to pay for the listing. If the seller accepts the buyer's offer, then the sale will progress to completion. If the seller does not accept the offer, then the seller can submit a counteroffer to the buyer. The buyer can accept the counteroffer or submit a new offer.
Memberships may only be sold up to the initial purchase price for the membership, excluding finance charges where applicable. A membership may not be sold for an amount less than any outstanding balance owed.