Selling Opel tigra

Hello everyone, I bought a Nissan Note yesterday, since my Opel tigra is not made for the winter (cabrio) Since it is clear to me that the tigra would only go out at the sling price at the moment, I have to park before this over the winter until the spring (March) in a garage to register. However, I do now worry about the sale. I then have to register the car for a test drive anyway (short-term license plate etc.) Do you have a tip or a Advice on what to do instead of the above variant?