Sam expressed interest in buying a painting from Jasper, whose asking price was $$15,000.$ Sam was only willing to offer $$13,000.$ Jasper told him that it was a very old painting worth a fortune and that others would gladly pay $$20,000$ for it$.$ Sam $$ decided to buy the painting for $$15,000$ on the condition that if he found that the painting was worth less than $$15,000,$ Jasper would have to take the painting back and refund Sam. Which of the following warranties did this sales contract have?

an express warranty

an implied warranty of merchantability

an implied warranty of fitness

a statement of opinion