I have been trying to find a way to do this, but not quite getting what logic to use.
Lets say there is a product "Chocolate" priced $10. If he adds this to cart, the second chocolate should be $8. If he adds one more i.e the third one, it should be $6.
So if he adds 3 chocolates, price will be $10 + $8 +$6
I know in Magento, this can be done using shopping cart rule. But this should appear in product page as well. Customer should know that he can get 2nd one at $8 and third one at $6. As per my understanding, if I use shopping cart rule, discount will be applied only in cart page.
Also if I use tier price, I can do only Buy 3 chocolates @ $X each, which is not what I want.
You can see a demo here: http://www.v2cigs.com/v2pro-vaporizer/series-3-vaporizer-kit (The above link is using Interspire, not Magento) We want to achieve same in our Magento site as well.