I am selling an Atlas lathe milling attachment. Appears that it could be model # 500A. Pictures show other numbers (10-501, 10-502, and 8188, if I see it correctly) on item, but not 500A. I have never used it (obtained with a used lathe), and don't foresee a use for me in the future. Appears to move nicely on the ways. I'm asking $275. I see these for well over $300 on Ebay. Offers will be considered. I'm in Idaho