What is a complete snowblower attachment worth

I am thinking about selling the snowblower attachment I have on a custom 10 and wondering what one is worth before trying to sell,its complete with the pulley for the 1 1/8 crank motors and belt cover for the side of the tractor,its not perfect as it sat uncovered for a couple years before I installed it on the tractor and has been covered since. I also have a extra snowblower that can be used for parts since it did not come with the mounting brackets,I dont really need to get rid of it but I do like using the plow better and need to use the tractor its on for lawn duty nest year and dont want to see it rust away behind the garage when I do remove it from the tractor.