Rollins sold Byers, a businessperson, a flatbed truck on a contract; Rollins assigned the contract to Frost, and informed Byers of the assignment. Rollins knew the truck had problems, which he did not reveal to Byers. When the truck needed $3,200 worth of repairs and Rollins couldn't be found, Byers wanted to deduct that amount from payments owed to Frost, but Frost insisted he had a right to payment. Upon investigation, Byers discovered that four other people in the state had experienced similar situations with Rollins and with Frost as Rollins's assignee. What recourse has Byers?