Hi @adghjkl, welcome to our forum!
I have translated your question to English as this is an International forum, please post any replies in English and it will be easier for me and other users to assist you.
Do I understand correctly that you are asking where you can purchase a second hand Xperia C4? If that is correct, we do not sell second hand devices, so I would recommend that you have a look on the second hand market in the country where you are situated and see if there are any available.
Here in the Nordic where I'm situated there are a lot of websites that sell second hand products and there may be similar websites available where you are.
I hope that helps! 
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