Hi. As you are a seller registered in the U. S. & as likely at LEAST 99.9999999999 % of all U.S. buyers only buy from listings offering pay pal you would be shooting yourself in the foot by not offering pay pal.
Many buyers limit their searches to sellers offering pay pal.
Would you really want to shrink your potential buyer base to only a handful of potential buyers. You are already limiting your potential buyers with that NO RETURN policy you have in your listings. Don't make it worse if you really want to sell.
Good luck, Jim