Since the development has been going on for so long now, buying the previous version of whichever one you like is a way to get all the features without spending so much. Realflight G6 is out now, so I'd expect copies of G4 to go for $40-$50 with the controller. The simulators require a pretty good gaming computer to run with all the detail stuff turned up, so if you're not at least running an I5 processor with 1 gb of video memory it's a waste to buy the latest version anyway.