Would anybody buy an authentic letter signed by Cesar Chavez himself?

I have come across a doent, a legal letter really, written by Cesar Chavez to a fellow about his organization. It is on the United Farm Workers of America letterhead with logo and signed in his pen. This is not a photocopy. I was just wondering if there are collectors or interested parties who might be inclined to bid for it if I put it on eBay...do you think it is unethical, or okay to offer this authentic piece for someone who would love to have it? Please, no insults, just feedback, please.