>>10389733If you're under a non-specific amount of units Hasbro probably won't prosecute you, however you should probably not sell it in a place Hasbro might sell in an official capacity or basically make them notice you. Granted there's not really official Hasbro conventions these days.
Dairy con is sort of an example; they're repaints or customs occasionally with extra/ recasted parts. sometimes they get Autobot/Decepticon symbols. But they only make like 200 figures tops