Final answer:
Sellers may offer a warranty or a service contract to buyers before signing a contract.
Step-by-step explanation:
Sellers may offer a warranty, which is a promise to fix or replace the good, at least for a certain time period. The seller may also offer a buyer a chance to buy a service contract, where the buyer pays an extra amount and the seller agrees to fix anything that goes wrong for a set time period. Service contracts are often an option for buyers of large purchases such as cars, appliances, and even houses.