Mint Mark: Check the reverse side above Monticello for a mint mark, which affects value.
Varieties: Research known varieties or errors to potentially increase value.
No Cleaning: Don't clean coins; collectors prefer original patina.
Price Guides: Consult numismatic guides for value estimates.
Professional Grading: Consider professional grading for authenticity and higher prices.
Market Trends: Stay updated on collector demand and market trends.
Authentication: Ensure authenticity, especially for valuable varieties or errors.