Longtimer here when we used to sell thru the newspaper classifieds with no pictures and minimal descriptions, amazing what news paper use to charge per word.
Anyway get yourself a money checking pen that also has the UV light. Line up the bills and draw a mark across them fast. Black mark nogo, brown your good. UV light also good for checking new billes with the lightup strip.
Ok gotta go new message for my first selling post. Wish me luck.