I have a used Miller RFC-23a foot pedal, in good mechanical condition. It has been sitting on a shelf for a couple years, and has a little dust on it. This is a two plug foot pedal and works with the Dialarc and Goldstar TIG machines. I am not sure what other Miller machines it will work with. Please email me if you have any questions. Will trade for a 6-pin Lincoln TIG foot pedal. These list for $300 new, but I'll sell this one for half that.