How do I create this rule in Magento, based on a particular product's quantity?

Question

I need to make a single rule in magento that fulfills following conditions.

There are 10 products from which 3 products should have the following rules apply.

1. On their initial price, if the user buys 1 product they will get $20 off.
2. If the user buys more than 1 combination of products from that 3, then they will get $25 off each product.

I am not sure how to do this.

Answer 1

Take these three products, and recreate them in a new attribute set. We'll call it promo.

I would simply create a rule in "Shopping Cart Price Rules" stating this:

If ALL of these conditions are TRUE : If total quantity is 2 for a subselection of items in cart matching ALL of these conditions: Attribute Set is Promo

Then discount the situation accordingly in the "Actions" Tab.

You can add another rule for three, four, five and so one within one rule.