https://xn--vm8a.com/ (https://xn--vm8a.com/) which is not the twitter X.com can be bought for 9,000,000 USD This will be interesting if someone will buy it.

EDIT:

HN automatically converts to puny code that's good. The letter X in that other domain looks like this: https://www.compart.com/de/unicode/U+A4EB

You can copy and paste it and add .com and see that it is the same as the puny code URL mentioned above.