Harley Purchase

Hello, I’m going to see a Sporti 883 (for my better half) and maybe buy it right away. I tried with the seller, he told me it was a GB import. But he would make a new TÜV/AU and I would get all the documents to register them. It doesn’t need to be changed or anything else. So I would have the dealer enter in the purchase agreement that the dealer will hand over the bike registration ready, I think that’s right? – Isn’t it if the machine here TÜV/AU gets new, then I don’t have to do anything anymore? – Which documents etc. should I get from the dealer (no HD dealer)? – It’s an EZ 04/2009, is there something specific to consider here?