One major challenge are spare parts since there are very little on the markets, we rely on old housings and are always on the search for them. As our process of refurbishment takes up a few housings we need them even in the future to get orders delivered immediately.
When you order one T4-VC and send us a second core in external good condition we can grant you a discount of 400 Euros. How we determine housings you can find here (https://vw-kern.at/blog/en/2020/05/01/pfandregeln-vc-t4-syncro/ )