Car – sale

Servus… I’m just standing on the hose. I’m selling my used car (still logged in) but the dubious figure who wants to buy it at an incomprehensible price won’t give my signs… He’s supposed to take red numbers with him. But how do I get my car logged off when I don’t have a letter anymore, but only the signs? and doesn’t he need the signs if he’s re-registering it? Generally… I can’t really believe it right now… Is there fraud? Someone offered me more for half a scrap box than I asked for in Mobile (have received more than 40 requests within 2 days) – from both private and merchants.