Selling GPT accounts is illegal. GPT accounts are a service provided by OpenAI, based on artificial intelligence technology, which can generate natural language text. Using GPT accounts requires compliance with OpenAI's usage agreement and terms of service. These agreements clearly state that accounts are for personal use only and prohibit resale, sharing, or selling to others. Similar to GPT accounts, many online services and platforms have specific usage agreements and terms of service. These agreements specify that accounts are for personal use only and prohibit resale, sharing, or selling to others.