Addon to CS-Cart and Multi-Vendor allows you to discount cheapest or the most expensive product in basket.
If you're looking to buy this add-on in subscription form, is it available here: Subscription add-on
Addon to CS-Cart and Multi-Vendor allows changing presentation of quantity discounts in store. It shows not only flat discount, but also percentage and allows adding more products to the cart with one click.
Addon to Multi-Vendor, Multi-Vendor PLUS, Multi-Vendor Ultimate allows to add "file" fields to vendor application form, to attach additional files to application. New vendor can send his logo, signed agreement or other documents inside the form.