A basic modular system with all the basic oscillators and filters you'd find in a standard VST plugin set will cost roughly 5 thousand if not more. It's a bit expensive really, but I suppose that's the cost of analog in a digital world. It might just be me and my reluctance to spend money but it seems like prices would be dropping for equipment if it was making as big of a comeback as it is, but prices seem to be relatively stable, sometimes more expensive as new small scale manufacturers come out with modules.