It would be nice to have a plugin that could verify the VIN of cars. Especially useful for car selling.
For example :

An user posts a listing with a car, and he enters a VIN, in a custom field made with "Attributes plugin", or integrated osclass function
Then the system checks it, matching with with other details in the listing , also made with "Attributes plugin" , for example Brand / Model,or integrated osclass function.
When the listing is posted, on the item page, there should be a image stating  " VIN Verified " and under it ​Check details.
If a user clicks Check Details, then a Pop-up window should appear with the details : Country of Vehicle built, Model,Make , Year etc.
Also it should be compatible with EU VIN and USA VIN
This info is found here

https://en.wikipedia.org/wiki/Vehicle_identification_number#Plant_code

and here

https://en.wikibooks.org/wiki/Vehicle_Identification_Numbers_(VIN_codes)/World_Manufacturer_Identifier_(WMI)

Not too hard until there is some free api for that.

//Edit: does not look like there is free api, so it would be connected to some paid service 

Not too hard until there is some free api for that.

//Edit: does not look like there is free api, so it would be connected to some paid service 

Not necessary an API.
The country codes, year and manufacturers are on wiki, so.. a database and a script to check against?

I was never checking how VINs are generated and what can be checked by VIN, but expect codes are variable and must be regularly updated