I have an 1811. I don't know what the difference is between the '11 and '12 series tractors. I REALLY like this body style machine. They are my favorite style cub ('82, '10, '11, '12 series machines). I have had my tractor for about 13 years and put about 600+ hours on it with virtually no repairs. I paid $1500 for mine when I bought it and I don't think I overpaid. It had a new mag 18 in it that had about 100 hrs on it when I bought it. I hesitate to say the machine your looking at would be worth that, but only because they are getting older. I've seen them sell on E-Bay from $500- $1200. Hours on the engine (I know you say it's got a fresh rebuild) and overall shape of the machine is something to consider. Remember, just because it has fresh paint, doesn't mean it isn't worn out. I've seen a lot of people fooled by a "good looking" machine. Check it over good. Good luck!