It will absolutely impact the cost, not to the point many want it too but it will. I want a Mark IV because I missed out originally. There are Mark IVs already on eBay running anywhere from $260 to $350. If this is even $400, removing the Mark IV cost even at original MSRP and I'm buying the gantry anyway I just got it at cost brand new. Why bother with eBay?
For people who just wanted a Mark IV, they went SDCC Ex or will go this, no need to fret about the original. It will drop prices just not dramatically.