Pennsylvania was one of the largest of the colonies, so they produced significantly more currency than the smaller colonies. $165 is not unreasonable for some notes, but it's hard to offer any advice without seeing pictures.
As with other banknotes, the safest way to assure something is genuine is for it to be slabbed and graded by a third party grading company like PMG or PCGS.
Edited by GregAlex
01/27/2018 01:54 am