Extension to CS-Cart and Multi-Vendor allows assigning currencies to languages and using those assignments in other add-ons.
Price negotiation is an addon to CS-Cart and Multi-Vendor allowing to perform price negotiation from product card in shop. Administrator can globally set price negotiation parameters during extension configuration.
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.