When it comes to security concerns, it's always better to be cautious. While I can't provide specific information about your server or the person who sold it to you, there are a few general things you can consider:
1. Trustworthiness: Buying from a reputable and well-known source is safer than purchasing from sketchy individuals.
2. Server Security: Ensure that your vless server is properly configured with the latest security measures, including encryption protocols and strong passwords.
3. Malware and Spyware: Regularly scan your PC with reliable antivirus software to detect and remove any potential threats.
4. Privacy Measures: Use a reliable VPN service to add an extra layer of security and protect your online privacy.
Remember, it's always a good idea to be cautious and proactive about your security.