The cheapest uncertified sim with a motion platform will probably cost you around £200,000.
A few tens of thousands for a fixed-base procedures trainer.
Around £15m for a full motion, certified airliner simulator with a full motion system, instructors station, etc.
As ever, there are state of the art machines for a small fortune, and "bargain basement" second hand machines - so if you want a B727 sim, you'll probably get one quite cheaply (which is why simulators for obsolete types tend to get used e.g. for MCC training).
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