Want my first gold coin but WAY out of my league when it comes to buying gold because of its price. How do I know whats a fair price on a pre '33 american coin?

Reddit: r/Gold reports: Want my first gold coin but WAY out of my league when it comes to buying gold because of its price. How do I know whats a fair price on a pre '33 american coin?. Full body text was unavailable at ingest time, so this brief is based on headline context.