Justin and Kate are good friends, and they attend an auction of fine artworks - paintings, porcelain, glassware and other things. They had discussed about how much money they each had to spend on interesting items. Kate was interested in buying a Coalport figurine and she asked Justin to make some bids for her. In the excitement of the auction Kate kept getting Justin to bid higher and higher. Eventually Justin was the successful bidder, but at a price greater than Kate's budget. Kate then told Justin it was more than she could afford and Justin, and as he was the successful bidder, he could have it. Justin did not want it. Advise Kate and Justin of any rights that they may have in this situation in the law of agency only, giving full legal authority for your answer. Who is liable to pay the purchase price, and why?