VCDS & VCDS-Mobile with HEX-NET Enthusiast 10 VINs| Ross-Tech
https://store.ross-tech.com/shop/vchn_10/
VCDS shows none of the 10 VINs have been registered, so all are available. Unless you select the vehicle to register it permanently (to do full adaptations), it does not count the VIN. Otherwise, you can scan as many vehicles as you want.
This is also over $516 shipped new to IL after tax and shipping from Ross-Tech.