buy a second hand laptop in japan

Hello,i live in iran and i want to buy a second hand laptop from japan and need some information about it.actually where can i buy second hand laptops,price,brands and etc.can you help me or introduce some sites about second hand laptops in japan?
Thanks in advanced

You can buy from Japanese online stores using https://anislo.jp.

There are many small stores selling used laptops in Akihabara. The place has plenty choices with different budgets, and you can try them before buying.

Compared to Hard Off etc (with no operating systems or programs and Japanese keyboards) in Aki you will be able to find English version keyboards often loaded with updated op system and programs.