In November 2018, Jian sold a boat for $30,000. There were no costs associated with the sale, and his adjusted basis at the time was $17,000. Jian received a $6,000 down payment, and the buyer agreed to make four additional payments of $6,000 each year, beginning in 2019. Jian reported a $13,000 gain in the year of sale. The buyer then made one $6,000 payment in 2019, but did not make any more payments. In 2021, Jian repossessed the boat. What is Jian's basis in the repossessed property?

$12,000

$13,000

$17,000

$18,000