(upper) middle class Kombi 10,000 EUR

Good morning dear specialists, I am still looking for a used car. I am looking for / wish for a large combination with appropriate interior and pleasant driving feeling. Budget approx. 10k EUR. Benchmark is for me an Audi A6 Avant 3.0 TDI (of course leather and Navi, switch or automatic I don’t care). This is a car that fulfills my wishes both of the size, the haptic as well as of the motorization. Unfortunately, it is clear to me that for the money such a car does not exist n will. Question is, what’s the closest thing to this? When I read so much in the forum, both diesel and Audi are rather negatively occupied. When I enter the following criteria at mobile.de only 1 Audi A6 Avant 2.8 and 2 or 3 E class 200T. not a single Volvo V70 (I once considered), no Ford Mondeo, which is so praised here (maybe an emergency solution) However, I don’t know Saab 9-5 or Honda Accord =>, what about it? No interest do I have in French, Ita The following questions move me: Are such vehicles (age, mileage) still “reasonable” or is that just a bunch of rolling electric scrap? Does a “serious” dealer still sell such cars to private (in my experience, rather no)? I could also imagine an “old” car, e.g. LS400 or W126. But that is probably pure sense? Do you think that this is the best way to do this? If it makes sense to look even further here or if you have to admit that you would rather look in the “bread and butter class” (middle class, golf class)? Then you would come according to the criteria Audi A4, Astra, Mazda 6, Signum etc. Thank you for your assessment!