I sold a ZT 0777 to a person exactly as I received it from the dealer. He received the knife and said that it should have come with a zippered case. So he ordered the case from ebay for $10 and now wants me to reimburse him for the $10. I told him I have purchased 3 ZT knives (2x 0777, 600) and none of them came with a zipper case. He wasn't satisfied with that answer and said that I should have known. I offered to refund his money + shipping if he was unhappy. He won't ship back the knife. He said I falsely advertised the knife and owe him $10. Can I get some input here. Does all ZT knives come with a zipper case?