I found a Japanese 1984 Maruishi RX-4 Sport 12 speed yesterday at a pawn shop for $92.50. The owner said all he knows is that they are rare and its worth well over $600. But from what I've read, they are low end. The front and rear wheel are both out of true, loose bearings, break cables need replaces due to rust along with the chain, freewheel, and the tires are dry rotted and flat. The Shimano derailleurs do shift properly. Well I need more info and opinions. He didn't really want to negotiate and told me he'll go down to $85. It's white in color and the handle bars are a pretty blue silk string kind of texture.