A serial number 1 10-dollar demand note sold at auction in 2014 for $381,875. $10 1878 Silver Certificate (Fr. 284) Very rare, the 1878 silver certificate is a huge deal with collectors.

obverse text: 10/ x / american banknote co. new york / washington august 10th, 1861. / a / act of july 17, 1861 / on demand, the united states promise to pay to the bearer ten dollars / patented 30 ...