SellstampProducts
Product groups
One storefront card for several alternative products. The customer picks one and buys it like any other product.
What a group is
A group is presentation only. Two to twenty products share one card on the storefront, and nothing about price or checkout changes. Use it for a product that comes as separate listings, like one course in three languages. If you want them sold together at one price, that is a bundle.
Managing one
Products → Groups. A group needs at least two products. If removing one leaves a single product, the group is archived and that product stands alone again.