Depending on where you buy it, they sell $400 to $500. I had an Epi SG that wasn't a deluxe that I sold for $340 with case. If it's in good shape, I would offer $250 and go from there, but I wouldn't mention my price until I was face to face with the person. I assume this is near you, yes?
I liked mine, except too neck heavy. A good guitar to have in the collection and I believe the Deluxe is no longer offered by Epi.