£16k is the depreciation to you and was just an illustrative example. The company reselling the car will want to make some margin on that; they will have costs to collect, prepare, service, etc the car.
There are 124 Peugeot E2008's under £16k with less than 30k miles.
The estate body type isn't particular popular compared to saloons, crossovers or SUVs. However if I search up to 30k, less than £16k, and estate body type I am getting 365 results.
E.g.
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You are behaving like a bit of a lost cause tbh.