You can try to sell locally or online using Venmo or Friends/Family type payments, those don't get recorded as income on a 1099 like a good/services payment does.
Or you can sell like normal and then you only need to pay tax on the profits, but that means being able to document the original cost which may or may not be possible. Then again...my understanding is that documentation would only be needed in an audit situation, I don't think you need to provide it when submitting your taxes. I have not done this yet but will have to next year for various sales, I'm not sure how tricky that process is going to be yet.