1791 silver dollar

Holy cow! A 1793 Trade Dollar! It would be priceless... except that the first Trade Dollar was struck in 1873, 8 decades later. This is a design that would not have existed in the 18th Century. Other ways we can tell it's not real: it has very soft features, as it was cast from a mold and not struck like coins. Also, the color is too even, a muddled gray; a real coin this old would have dirt in the devices, stains, uneven toning... and be much more beautiful. There is no value; if you sell it, now knowing it's not real, you have to disclose it is not real. So maybe $3 to the interested party. Don't feel bad, there are thousands out there that have fooled others.