Indebted comprehensive damage & damage reduction obligation

Hello municipality, on Sunday I parked my 2004 Leon unsanft in a guardrail. So now I’ve been struggling with the formalities for the last few days. A first assessment of the master at VW was a damage of about 8,000, if you look at comparable cars on mobile or autoscout24, the car without a cracker still has around 10,000. I am now concerned about what I do best. The insurance company writes to me yesterday, I have to get their permission, who And also that the bid amount on sale has an influence on the performance of the damage. This is probably called the obligation to reduce the damage of the insured person if I understand this correctly. I ask myself now: – If I say that I fix it somehow, they pay me according to the expert opinion regarding fairy tale tax. What about loss of value? – After a few weeks I decide not to repair the car at Uncle Egon after all, but to a flying Hän If I now run from Pontius to Pilate in order to achieve the highest bid, I will be punished, because my insurance will then simply pay less, did I understand that correctly? Thank you for your efforts, but I have had nothing to do with it so far. I would like to thank you for your efforts.