I guess it's okay to buy an old creator account but you have to be really careful because Imvu been very strict lately in detecting accounts sold. Once Imvu detected that there's some malicious activities in an account you are automatically disabled and then you have to file for a ticket and the verification interrogation starts lol They would even ask you which country it was logged in for the first time. Even if you have provided the original email and password of the account they still refuse to give it back and give you another reason to hold the account like read the tos, not allowed to share, sell an account and etc.
If ever you are buying a creator account it would be best to find an account in same country. Just a tip. The rest buy at your own risk.