VAT on sales abroad

Hello together, I am a freelancer and am about to sell my company car. As a self-employed person I will be able to issue VAT with inquiries from dealers who export abroad. It seems that most of them are dealers who have a company in Germany but want to export abroad. Now some ask me if I can sell the car without the VAT (i.e. net) because the car goes abroad. I wanted to hear your opinion if this is a klever idea and if so, what I need as proof of everything (export certificate, etc.) Greetings and thanks