they're comfortable despite the fact that people have a hard time thinking they don't belong. I don't care if they came with the car or not. The car runs, and drives well; seats are seats, big deal. If you're going to be picking over the seats, then this obviously isn't the car for you; MOVE ON.
I am looking at convertible cobras now, I'm sorry man... The seats are a big selling point of the cobra over the GT. Your price will have to come down to get some interest, or sell it to an unsuspecting local. I'd say with your miles and the cloth seats, it will sell for 14k.
I saw this car when it was for sale in PA. They had it for sale a LONG time. I'm guessing you paid 17. That's about what you'll get out of it. Even with the maintenance you've had done