Do you want a working treadle? When I got mine, the belt was broken but they told me it would work. I turned the flywheel to ensure all parts moved. I made sure the pulman was intact, I made sure the bobbin covers could still be moved and they were both there and the feed dogs moved. I inspected the shuttle basket to ensure it moved back and forth and ensured the thumb screw that holds the needle still moved. I inspected the tension assembly to ensure it wasn't frozen up or the spring was completely compressed.
Things I had to order for mine: A new belt, a new shuttle, bobbins and needles.
I paid $75 for mine and invested another $50 to $70 for the needed parts. The bobbin winder on mine was frozen up but my DH simply removed it and soaked it in brake cleaner fluid, kerosene would do the same. That freed it right up. I managed to get a bobbin wound on it but got the wrong size needles so it won't pick up the bobbin thread and I need to re-tighten the belt. Here are pics I posted of mine way back when I got it:
http://www.quiltingboard.com/t-36680-1.htm