They show up pretty regularly for sale, cheap. Some will be ok, but many will have dead/dying Cds cells and/or bad resistors. Virtually all will need service of some sort, keep in mind that they are all getting close to 50 or more years of age. I have one good one which I use only for macro work where TTL metering is a real convenience. Now that I have a couple F2As, both with good meters, i guess it can die if it wants. Check Sover Wong's website, he may have some options. He's located in England.