Mark, your points about 531/SL are well taken. Certainly most of the best bikes $ wise are made of those two. I'm not sure what the market is around where you are for old bikes, but 35-50$ is top end around here in a thrift or auction, the auctions being lower. I kinda think your area may be higher than mine-- $100 is awful high for a UO8, the last few I have bought ranged from $0.75 to 5$, but I know from hanging out on this board 100 clams is a reasonable asking price in some areas. At 35$, a bike with Ishiwata 022 is a bargin, and I can easily make it back, if I should choose to. However, some brands, like Treks and Bridgestones, have pretty good resale value irregardless of the tubing... resale value is a tricky thing indeed. There's enough odd factors in there to make it hard to anticipate. These would include marquee, tubing, age, components, condition, frame size, and a host of other small factors (Some Bridgestones are worth more because of the Petersen connection, for instance). My idea with the list was to try to get in as many quality rides as possible, and miss most of the junk. Not the easiest task, given the convergence of so many factors (and I left out Suntour Superbe, I need to drop that on the list next time I see the fellow). I have sold bikes with both Tange and Ishiwata, and in every case, there were several people interested, judging by ebay bids. In fact, the last Tange I sold, a Panasonic DX5000 frame, went for more than some of the 531 bikes I've unloaded in the past. It was a real beauty of a frame, tho.