sometimes the raw materials in making pumps can be cheap but it's the amount of time, manpower and thus money spent in coming out with the design and finally production of the pump...
all these have to be recouped by high pump prices....
that's why clones like resun will always be cheaper, because they do not have to spend as much resources in getting their md40 or md55...they just need to get a few samples and *monkey see monkey do*, cutting short the learning curve, thus the final product is rolled out without much initial capital outlay...and thus cheaper in comparison
dealer mark up will definitely play a part if goes through the distribution chain....but even get directly from manufacturer, the price may not be cheap for the reasons i suggested...
a bro said before, it can take months to come out with a good design, yet just seconds to copy it
Hope Resun comes out with a White Dragon series soon