I don't know the going rate now, but it has to be seriously stupid money for what you get. After I bought my GT750J, I promptly swapped a '78 GS750 front end onto it and sold the original 4LS for more than the total I had into the bike and the GS front end. And that was twenty years ago, back when the only people who wanted 'em were vintage racers who were forced to run drums.And still they come in search of the elusive water buffalo brakes. What is the going rate for a complete GT550/750 4LS brake with cables and lever and stays? I may have one to sell along with a set of GT550 Drum brake type 35mm forks that I'm thinking of swapping out on an old 550.