Modern Dragon Knight

My cat can talk, there is an idol-level elf beauty at home, the thief is my assistant, and the doorkeeper is a giant wind dragon. On this day, a distinguished guest came to the house. Then, he pointed at the picture and said proudly: "When buying something, you have to choose carefully, so I chose it and bought this back!" When I saw it, I resisted the urge to beat him and said: "Your Excellency, this is the Nimitz-class aircraft carrier of the United States. If you want to buy it, no one else will sell it! And you don't have anywhere to put it! " "Not for sale! " The guest touched his chin and said: "Then this is it! " "This is a space shuttle, it's useless if you buy it! " "This? " "That's a nuclear bomb, no one dares to sell it…! " "This……! " "This is the Bismarck battleship, it has sunk! " "So what exactly can I buy? "