The Laughing Salesman S01 E36 Collector

Company man Kichide Maniya is an addicted stamp collector and Moguro offers him an extremely rare Hawaiian 2 cents stamp in exchange for his entire collection. Kichide is happy to hand over his collection to overcome his addiction, but Moguro says he must never sell the stamp. Later, Kichide's mother reveals that she owes millions of Yen after playing the stock market, so he tries to sell the stamp but is killed by a front-end loader as he rushes across the road.