While looking for some lenses in Contax/Yashica mount for both mirrorless and film, I happened across a buy now offer on eBay for a used Yashica ML 28-85mm f/3.5-4.5 Macro. These are scarce to locate and probably more sought after than other C/Y Yashica branded zoom lenses, as they have a reputation for edge clarity, color rendition, and sharpness. When they do show up for sale, they may not always be in the best optical and/or mechanical shape due to some inherent design issues.
This particular lens was listed at a good price but as noted from the seller, it was suffering from heavy hazing on the internal elements. Aside from that, it was fully functional and in reasonably good cosmetic condition. I clicked the 'Buy Now' button and had it in-hand several days later. This wasn't going to be my first lens tear down or cleaning, but it would be my first attempt with a zoom lens.