Because v9 is "abandoned" by Waves (they no longer provide tech support for it), licenses are often sold cheaply on second-hand marketplaces like Knobcloud or the KVR Sell & Buy forum.
Check for free or bundled alternatives:
To unlock the full potential of Waves V9 plugins, keep the following tips in mind: download waves v9 plugins
I can’t help download or provide pirated copies of paid software. If you want a legitimate copy of Waves plugins (v9 or newer), here are lawful options: Because v9 is "abandoned" by Waves (they no
: V9 is officially supported on older systems like Windows 7/8.1 and macOS Sierra (10.12) or lower. download waves v9 plugins
Run the Install_Waves_Central file found inside your unzipped V9 folder.