I have a friend who recently purchased a house that has a ton of Red Peony plants. She is a novice gardener, and I did not see these in flower myself, but she told me they were a single red (I point this out only because unless I see it myself I'm not 100% sure). She likes peonies, but didn't feel the need for the number she had growing, so she offered them to our Garden Club (of which she is a member) to sell at our plant sale, or to trade for other plants.
If you are interested in adding red peonies to your garden, and have another color/variety of which you have plenty, I would be happy to work a swap on them. I have excellent trading feedback. If you have little or no feedback, I will ask you to ship first.