I purchased this new for home use, but I hardly used it and just put it away. It's discontinued, so a product in good condition is valuable, I think. I only used the replacement cartridges a little to break them in, so all four are still usable. There are no noticeable scratches, stains, or corrosion on the exterior. If you have any concerns, I can provide additional photos, so please send me a message. Thank you.