export motorcyle to Czech republic

Hello German friends, Because my German is very terrible … so I will continue in English. I live in the Czech Republic and want to import a second hand motorcycle from a private seller in Germany.. I want this, because you Germans seem to take good care of your bikes and offer better prices compared to Czech Republic. I am trying to find out which documents I will need to get from the seller. I am also trying to find out if I need to make specific export arrangements. Does anyone hav e experience with this? Does anyone know which list of documents I will need to acquire from the seller? I suppose I will need, at least, the following: -vehicle number/vehicle paper -invoice from the seller that states he sold me the motorcycle -TUV papers/number(though I understand I can arrange DEKRA myself in case of missing TUV). Am I missing anything from this list? Then there is German customer(i think). Does the seller need to arrange de-registration from Germany? So, will I need to arrive from Germany? Ange some type of export document? I plan to transport the bike in a van so I guess I don’t need those red license plates for export. Sorry for the many questions… I find it difficult to find specific information for arranging a bike for export. So I hope I am asking in the right place.. Any advice is very welcome! Thank you!