Get a collection of sound effects at a discount, except you get to choose the sounds, either one at a time or all at once.
Soundpacks will add sound effects credits to your account at different discounted tiers. Then use these credits during checkout, whenever you want and for whatever sfx you want. You can grab one sound at a time or use all of your credits at once. One credit equals one sound effect, of any price. The bigger the Soundpack, the bigger the discount.