text: The only PERFECT vintage Bowden I have ever seen is at the Smithsonian on loan from the owner. The value of such an item is going to be hard to pin down but perhaps you can do an online search.\n\nStrangely, the Spacelander was designed about 1946 in aluminum but not placed into production until 1960, so if he has the original 1951 fiberglas prototype it's value is inestimable. A mint 1960 version has seen pricing in the $10,000 to $12,000 range.\n\nThe Spacelander, as you probably already know, was reproduced in the 1990s, and I think they are still available today, these can be had for less than a couple of thousand dollars.\n\nWhen it comes to pricing bicycles, even the smallest imperfection detracts from value unless the bike is hopelessly rare (the Spacelander may fall into this category). However, value is enhanced with original bills of sale and original literature and hangtags, etc.\n\nYou might want to check out http://sheldonbrown.com to see if he has any additional info on them.\n\nEDIT! You can find the reproductions on http://nostalgiamerchants.com