One thing at a time. I hear your stress and understand. And I don't think that what you are stressing about are "little"--A yard sale is stressful. And so is T and a female yearly--UGH. Plus the fact that you are on your own....
stress for sure.

make things easier on yourself. put like priced items in one area and mark "these items $1...$3....$.50" etc. Put stuff in a box like kitchen stuff and mark the box not each item. i've seen it done and mostly if there isn't too much in one box, ppl like to rummage thru. some things, if you have an idea how much they are, you don't have to mark. and allow room for bartering. ppl love to know that any reasonable offer is accepted. we do alot of garage sale shopping. if the prices are too high and sellers won't barter, we don't stay very long--nor does anyone else for that matter.

just some ideas.