I met a chap recently who had got an old pair of Zeiss bins at an auction, for 25 euro. He was a casual birder, and let me have a peek. They were pretty amazing, although I didn´t have anything with me at the time to compare. I´ve no idea how old they were, but they were roof-prisms, came in a big old leather case, and had "Carl Zeiss" written on them. They were 8x56 mag., didn´t seem that heavy to me, I´d estimate about 950 grams. Great definition, seemed crystal-clear to the edge, good colour rendition and I think they were more than a bargain at the price. Apart from the ridiculously low price, are bins like this worth pursuing, or do they have drawbacks?