Agreed. Is there a reason you want a GMT or do you want a Rolex GMT?
Personally if I wanted a GMT I'd buy a Grand Seiko. But then I can't really imagine a modern day situation where the functionality of a GMT is required. For context I travel a lot and use a radio controlled G-Shock mtg if I'm on business - accurate and inconspicuos. Is there a reason for rolex GMT other than the potential rise in value?