Dynamic Price addon

Im looking for an addon to do this. For example lets say I sell stuff in quantities of 1000, 2000, 3000, etc. For each of these quantities id want an option that automatically scales its price for each quantity. So if I select “gold” for 2,000 pieces, its more than 1,000 pieces. Even if it was linear it would be great, such as 20 or 30 per thousand. Is there any addon that does this?

Have you tried product options?