I'm selling off my supply of ABS M1s, and there are two to choose from. The first was used on and off for about a year, but it has been thoroughly cleaned and is still in excellent condition. As a consequence of the cleaning, a couple keys came away with scratches (Tab and numpad 2). There are 12 pictures in a Dropbox gallery:
http://www.dropbox.com/gallery/130863/2/For%20Sale/ABS%20M1%20Keyboard?h=ebd3b2Because of the scratches, I'm letting the first one go for only $30. I have another one that was used on and off for about a month, but I haven't attempted to clean it yet because of what happened with the first one (hardest keys to get off I've ever seen). It doesn't really need a cleaning, though.
Since the second one was used for a shorter period of time and is still unblemished, it'll be $45. Buyer pays shipping in either case, and I'll go with whatever service you'd prefer (UPS, FedEx, USPS). North American buyers only, please.
I will entertain reasonable offers, but I think the prices are pretty fair as-is. Bundling the boards together, however, might result in a pretty sweet deal for you. ;-)