United States First stamp Sc#1 on folded letter
 

Not sure if there are any stamp collectors or of US historical items but here is the first U.S. postage stamp, 5 cent Benjamin Franklin Scott catalogue #1 on an 1851 folded letter. Nice orange brown color variation stamp with a red circular grid cancel, a file fold as seen, four full margin stamp, not cut into as so many are. $500 delivered, check or money order.