Depending on what you want / need.
The Wave 2.2 simulation is available free of charge from my web site; see
https://www.hermannseib.com/english/synths/ppg/wavesim.htm for details. I've updated it some days ago to include a 64bit PlugIn version, BTW. While the standalone version (part of the Waveterm C demo) is a bit limited, the PlugIn isn't much, just fixed to the Wave 2.2 with a V6 operating system and without someof the "experimental" features like turning off the VCFs/VCAs. This is probably be enough for most people who just want to "taste the water".
As for the "big" versions ...
The full WaveSim package (Wave 2.2/2.3/EVU emulation) can be had by sending 40€ to my PayPal account, using
him@hermannseib.com as receiver. Please also send me an Email if you do that, including the name you want to see on the simulated Wave's boot screen, because you get a personalized version and I need to know where to send it to - the address I get from PayPal might not be the one you want it sent to.
If you also want Waveterm C, that's another 40€. Please keep in mind that this still is an incomplete program - analysis, sequencer and the like are still missing. While I do work on it from time to time, I can't commit to any deadlines - you should treat it as "maybe it will never be complete".
If you also want the complete PPG System Library for the Wave 2.3/EVU in Waveterm C-compatible format, that would be another 20€. For people who already have the PPG System Library disks and can "rip" them into disk images, this is not really necessary - I'm also providing programs to read these images and export the files into Waveterm C.
So, grand total, if you want all of the above, would be 100€.
Processing time should be about a day - I create these packages by hand, as it's a very low-volume operation.
Updates, by the way, are free, unless I release a completely revamped super-duper version, which is highly unlikely.