Selling my APR GT-1000 dual-element 78" wing which retails for over $3,200. This generates mega downforce, especially because it features the extra $400 high-downforce tear drop end plates.
You'll need to make or already have your own chassis mounts, but if you're looking at this wing that's probably not an issue.
Specs and details here:
https://shop.aprperformance.com/products/universal-fitment-gt-1000-wing?variant=47530736550210