For Zefina Invest AG we have developed the Cartrades app, which makes it possible to offer trade-in vehicles to dealers in the region. The customer enters the garage, the garage records the details of the exchange vehicle, scans the vehicle ID and releases the vehicle for bidding for a limited time. The dealers each receive information when a vehicle is offered and can place their bid. The vehicle owner can then decide whether the offer meets his expectations and whether he wants to accept it or not.