Hey man, my best advice I could give ya is to drop $15 into that carb and give it a rebuild, and rig some sort of exhaust up if it's that bad. It'll sell a lot faster if it runs as well as it can, rather than people having to trust claims of "it'd run great with a new carb." Made all the difference when I went to sell my '71 Swinger...body was very clean but people walked away reluctantly after driving, wasn't very confidence inspiring with a bad carb! After fixing it, the first guy to come look at it promptly paid me just under full asking price for it...
Travis