I just picked up two foot controllers at Goodwill today. $8.00 total. I went there looking for just a power cord after seeing the prices for plugs at Ace. Wire was $.69 a foot and plugs were around $3.00 each. I would have had $8 or $9.00 just in making a cord. Extension cords were high priced too, around $9.00 each so I couldn't save any money that way either. Far cheaper to go to a thrift store and either find a cord or buy something and cut the cord off. Both foot controllers are wired for 3 wire plugs at the machine. I'll have to do some rearranging on the wiring for them to work with my machines.
Our Goodwill is pretty good about leaving accessories in the cabinet with the machine. It's a little hit & miss but they don't purposely separate stuff.
Rodney