Maine has a 5.5% sales tax and there have been legislative efforts to exempt gold and silver bullion and coins from this tax. A bill (LD1051) was passed by the Maine Senate in May 2023 aiming to remove this tax, with an intended effective date of January 1, 2024.

However, the final outcome of this bill and its implementation are unclear. It's recommended to consult the Maine Revenue Services or a qualified professional for the most up-to-date and accurate information.