Stereo gear mark-up

Looking at buying a DEQX signal processor - their basic model is around A$3,800 from an Australian hifi store whereas the distributor/retailer here wants NZ$4995.

I know electronics are generally dearer here compared to Aussie but it's got me wondering - what sort of mark-up do the importers put on equipment - 10 to 15%? And then the retailers add another 40 to 50% - does this sound right or does it depend on the equipment being sold?

Thanks