So the Prices page is arguably one of the sites best features. I have an idea about making it a lot more user-friendly.
Add a feature where you can select any OVR (out of the list of overalls that are listed in the training/prices graphic). When you select the OVR, a dial appears underneath the graph, titled under that selected OVR. Two numbers will be near the dial. The top number is the training ratio per coins, the bottom number is the coin price for the card. The user can then move the dial from left to right, and a calculator will reflect the training rate per any cost, for that overall.
For example if you select an 85 overall card and the going target rate (already listed on the page) is 100,000 coins. The dial would say 100,000 in the middle, and you could drag it left and it would go all the way to zero, or drag it right and it would go all the way to double the price or something. And wherever you drag it, the appropriate training rate is calculated above using some type of smart-person computer math algorithm or a calculator or something. This way users can see the training rate for every price and not just the average one.
I do realize that this is not an simple task. But I really feel like it would be an amazing feature to add and help newer users better understand training rates.