To be fair with the company UsedPc4Sale.
They finally contacted me about my defect product (internal Hard Disk). They asked me to send the defective product which I did.
They sent me a notification when it has been received and checked, telling me that they will send me a new hard drive. Let's see ...

Hello all, excuses to use English. Unfortunately I recently ordered a computer in this webshop before reading the comments.
I ordered a Dell 755 for 150 Euro plus BTW with no OS installed. It arrived home after 2 days from ordering! Even though, the DHL thing is onzin, they provided me with an ...