Increasing the cart value are sellers biggest low hanging fruit and there are many ways to achieve this: Upsell and Cross sell. You can use Bundles or commonly called as Kit items to create a bundles of product, and offer a single product which can allow seller to offer Buy 1 for say $10 and 3 for $25 discount, or Buy a pre-defined combo of items.
Traditionally sellers did it by compromising and creating a new SKU and diving inventory on Warehouse / Amazon , we do support Virtual bundles with our mapping interface allowing You to offer more in a single click and a clean and easy journey for customer.
Features like these differentiate us from others. Hence we will ship 4million orders this year.