I'm thinking about a used rz67II, it's really cheap here in secondhand market, but I don't know what's the difference between II and II D, except that D version has electronic contact with DB.
Does anyone have used both II & IID? if the difference is not big, I'll neglect IID since it's hard to find in secondhand market and/so it's much more expensive. A used II is about 800$ but a used IID is at least 2000$(in China)
Thanks in advance.