Honestly I'd pass on the coin even at a bargain price. There are much better looking examples out there for the same money.
I wouldn't expect an R-3 to fetch a premium. i don't do halves but I know in the early copper often even R-4's won't really bring a significant premium. Premiums really seem to start at 4+ to 5-.
I love the look of it, it looks original but I'm not up to date on the price range of these as it is not my area of expertise, but I'd check Numismedia if it's raw and offer 10% back of guide for VF 30 or 35 money. Nice looking half.
I agree with Lance - retoning over an old cleaning and not necessarily in a good manner. And I also agree with Doug - find a nice gun metal grey example in this date.