You just don't want to listen, do you?
The advertised for car now (not when it was new) will most likely NOT be the sale price. In reality dealer will probably pay 13k-14k for the Fluence as trade in.
Then you have to consider the value of the scraped car (which in most cases was at least 1k). Straight away this means nearly 3k euro depreciation in 2 years in best case scenario and 4k+ in worst case scenario.
3k-4k euro depreciation in 2 years is pretty good - not remarkable though and as I said earlier, no where close to bangernomics territory...