Looking at our data trends for VIN API, we show about 15% of all requests are for the complete data set. It's the same price as the basic data set and rich with a ton of data.
Check out the data set from this post over 1 and half years ago. On top of the basic data set's year, make and model, the complete data set comes with data like MSRP, MPG (city and highway), dealer invoice, gas tank size, etc.
We get tons of hits for basic data, but at no additional charge we also provide the complete data set. Just add a complete
=> "true" to your request. So simple and there's no performance hit.
Here's another look at the data elements from a comprehensive query: