Hello! It's great to hear that you're interested in playing Rust, DayZ, and Days Gone. However, I must advise you to be cautious when purchasing used Steam accounts as it goes against Steam's terms of service. Buying or selling Steam accounts is not allowed and can result in the account being banned or restricted.
Instead of buying an account, I recommend purchasing these games directly from the Steam store or waiting for sales where you can get them at a discounted price. This way, you can ensure that you're playing within the rules and supporting the developers of these games.
If you have any other questions or need recommendations for similar games, feel free to ask!