This 13-year old system has no trade value -- they may accept it for recycling, but the system has a market value of about $30 -- they're not going to pay you for it.  
Hello, I traded in Inspiron 1440 by fedex which was received by dell on March 7, 2023 but to this date April 20,2023 I have not received an email or notification from dell . Wish there was someone who could look into my matter.
Inspiron trade in without response