Go to a coin shop that does appraisals. It might cost you about $60 per coin. Just make sure they tell you more or less how much they COULD sell for. Before you pay the appraisal. It wouldn't make sense if you go and appraise a $20 coin for $60. There is one in North Arlington I believe that does this.
Shana, For a free auction evaluation, visit https://www.ha.com/common/acquisitions.php?target=auctionevaluation&type=social-cs-googleplusfreeeval- 092517. You can also call us at 1-800-872-6467.
Here's a link to Heritage Auctions' guide to selling your coins... https://coins.ha.com/ref/beginners-price-guide.zx?ic11=SellHome-Worth-ValueGuide-WWW-121916
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