562 gave you good advice. Go on eBay and see at what price similar pieces are listed. This piece looks like it may need a tiny bit of TLC, such as shoring up in the middle.
If it is comfortable, you will get more for it---and be sure to mention that in any ad. No rips/tears? Smells okay? No mold or mildew?
You could always take a photo of it and show it to Jay (Jim? I always forget his first name!) Main at Main Antiques. He's an honest man and will let you know if you should sell it or donate it. It has been my experience that people are still buying furniture, even when other things aren't selling.