I have created an attribute
price_used and the type is price. I know how to display this price in frontend, i use this method and it works ok:
<?php echo Mage::helper('core')->currency($_product->getPriceUsed(),true,false); ?>
I need to create a separate addtocart for this price, i have tried many things for example overide observer but it will affect also normal price.
What would be the correct method to make this work for my custom price and also not affect the normal price?
I do not want to use magento's custom options for products.