Buying a Roadtrek CS - any advice?

As Rodger said, 18% has traditionally been what is considered a very good discount off of MSRP for a Roadtrek. They have played with the pricing lately with "free" add ons like solar, which can confuse things and would alter the % you actually see.

I don't know how well the CS is selling overall, but the local dealers website seems to show more of them coming in, and being sold, than the other Roadtrek models, so it may be harder to get a maximum discount on one.