7K seems reasonable.......the market just sucks right now, and it will probably take you a while to sell it.
About 3 months ago I sold a nice solid 73 Rallye Charger 360/4 speed, with new interior, wheels and tires, a lot of mechanical work done (new brakes, shocks, new clutch, I pulled the engine, painted engine and bay) etc. etc. etc. The only thing car really needed was a fresh paint job, but it was presentable.
I saw folks asking anywhere from 8K to 12K for cars in similar condition, so I put it on eBay with a high reserve. Didn't sell, top bid was 5600. After it ended people started emailing offers, I finally sold it after a month and I took $6600 for it.
Good luck with the sale,
Jason