Did a yaris a while back, car was immobile and due to high miles it wasnt worth putting right, so even as a spares or repairs jobbie i'd have got £300 max for it. Managed to sell the front end panels,engine and 'box, and a few other odds and sods, got about £650 in the end, which included about 65 for the scrap shell.
Its worth it imo, in the long run you can make a fair bit by selling all the tiniest bits and bobs, but it does mean you have keep everything somewhere. I'd just aim to sell the main bits quickly and scrap the rest.
What car is it?