How do you sell CWs for CSC in your regular shop?

When you put a CW in your shop, the option to sell them for CSC instead of sP will automatically be there. Just pay attention to which box you're putting the price in, so you don't accidentally price an item for 500 sP instead of 500 CSC or something like that.

Also CWs are the only items that can currently be priced for CSC instead of sP in shops, any other items that you'd like to sell for CSC you'll have to use trades for.