Firstly, the condition of your electronic item should be checked by you whether it still works or not. If the product is in working state, you may donate it to institutes like schools where refurbished computers are often used. It can be of special help to donate your printers, computers, etc., if you are running and upgrading an office. You can sell your electronic item if you do not want to donate it.
If you are in doubt whether your item can be sold or not, you may sell it to someone who can sell the electronic item after refurbishing the same. If you do not need any electronic item, you can also give it away for free as an alternative option. You can also advertise or sell your items on various online websites.