I would say you might be able to sell it for about $400. It is a used laptop with hardware from 2013 (the Core i5-4200u). There is no longer any warranty for it.
People can buy a new laptop with the Intel Core i3-7100u, Intel HD 620 graphics core and a 1080p screen for $350. The Core i3-7100u would be pretty similar in performance to the i5-4200u and the Intel HD 620 is more powerful than the Intel HD 4400 (though still weak compared to a dedicated GPU).