I haven't stocked them myself but in some areas, there is a good demand for them. My area is one of 5 to 10 acre plots where smaller tractors are needed and most folks like the HST tractors and love the standard features on the Montana compacts. In an area with larger land and if selling to a guy who is going to do his own repair work, the C series can be a great way to be able to provide a lower cost tractor that has a lot of mass for the buck! Just depends on the area you are in as to how well they are liked.
They are NOT as refined a product as the LS/LG offerings which from a quality standpoint, are as good as any brand on the market. The C series is however a design that has been proved by time to be a tough tractor and there are a heck of a lot of these things in the US.
Ken