What's my laptop worth?

Hey everyone, I was wondering if there are any reliable websites out there that can give me a realistic, objective idea of what my laptop is actually worth right now. Or, if someone here actually knows their way around hardware, maybe you could just give me your take on its value. I’m looking to sell my current machine, but honestly, I have no clue what kind of asking price won't just get ignored...

Here are the specs for the unit in question:
https://www.notebooksbilliger.de/not...+f556uq+xo528d