Doraemon
Vending Machine
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Doraemon has a vending machine which is also a time machine. Example: You can use it to buy things at prices in 1925 so very cheap and Nobita makes money selling cut price things to his friends. He decides to try some sweets from the future (2561 AD) and they are heavenly, but so is the price of 230,000 yen which Nobita cannot pay.