Never pay full price for Waves plugins. They run a "Sliding Scale" sale nearly every month.
If you want to use CLA Vocals safely, you don't necessarily have to pay the full retail price. Waves is famous for their aggressive sales tactics, which work in the consumer's favor.
When you buy a Waves hardware interface (such as the Waves Touch or a broadcast mic), they include a voucher for 1 or 2 free plugins. Many users sell these unused voucher codes on eBay or KnobCloud for $15–$20. Search for "Waves voucher for sale."