At
http://page16.auctions.yahoo.co.jp/jp/auction/u53199477, while browsing about looking for Brother Switch keyboards, found this one in what appears to be quite good condition for 5,000 yen, or just under $52. Japanese layout and all, but perhaps of interest to a collector or someone wanting to try the switch type.
The seller is also selling one in unusable condition for 1,000 yen.