Please use the IRAC method. While cleaning up his parents' storeroom, Max found an old Spiderman comic book that belongs to his grandfather. He knows that collectors are willing to pay high prices for old and rare edition of such comics. Max cleans the comic, takes pictures of it, and posts them online, putting a price of RM500 for the comic. Joey contacted Max saying that he is willing to buy the comic for RM500. Joey made the payment and on the appointed date, Max handed the comic over to Joey. Two days later, Max contacted Joey saying that their contract is void due to mistake. It turns out that the comic is worth much more since only a few copies are available. A check on the Vintage Comic website shows that the price can run up to RM5000. So, Max wants his comic back and is willing to give the RM500 back to Joey. However, Joey disagrees and says that their contract is valid, and he is keeping the comic. Advise Max on the validity of the contract based on the rule of mistake and whether he can get the comic back