I have used custom options to create a drop down for prices based on weight of products(like, 250gms - $10, 500gms - $20). I am looking to add it in product listing page. I have gone through this solution given by Vinai in stackexchange.
But being a beginner in Magento and PHP, I was not able to clearly understand what are the changes needed in
It would be really helpful if someone can give little more detail about what the changes are.
Install the module provided here into your website and you can achieve your solution.
Let me know if you face any query regarding this.