Agree that the 3c Washington is the best of the bunch. It is a US #11 from the bottom row of a sheet of stamps. The extra margin makes it a bit more interesting and valuable. I suggest soaking it off the paper - the paper does nothing for this stamp, and it is in bad shape. You will still be able to tell it is a Memphis July 6 cancel. If you've never soaked a stamp, it isn't hard. Get a paper towel, a small stack of paper, and a stack of books or something else heavy and flat. Put the stamp and paper in a small dish of clean cool or lukewarm water for a few minutes. The paper and stamp will separate. Discard the paper and VERY gently grab the stamp with you fingers in the water and rub SUPER GENTLY to remove the gum. Then take it out of the water, put it on the paper towel long enough for most of the water to soak off the stamp, and then place the stamp between sheets of plain white paper. Put maybe 5 sheets under and 5 sheets on top and then put it on a flat surface and then place the books on top. Leave it for at least a day to dry. The stamp is worth maybe $20. The others are worth a little bit too - maybe another $10 for all of them. If you just want to sell them, you could put them all on eBay
with a starting bid of $20. I'd leave them on the paper if you go that route.