Komehyo in Central world.
Its a Japanese chainstore specialising in second hand luxury goods. You can visit their site and contact in Line and get a quote in Line. I bought an Explorer 1 from them, no worries. They have a store in Terminal 21 and BangNa too. They need to make a profit so you wont get market rate. You'd get more on Chrono 24 but then you got the risk of disputes. I wanted to sell a GrandSeiko to Komehyo that i bought at Gaysorn for 190k 3 years ago and Komehyo offered me 80 k so not a great offer. There s also a cluster of watch shops like Radium watch smtg at the top fl of Central World, I got the exact same offer from them.