Swings and roundabouts mate from my experience!
Some bits make good money others dont (my 500 cooler went for £330 when I expected at least £350 for example)
Also there is a huge number of parts going at the moment and spares day is coming up soon I think as well.
You shouldn't lose out from doing it, but it is a lot of work and a huge amount of time! When I broke mine I spent all day at work answering emails/PMs etc and got nothing done at all
All said and done I think I made a small profit on my Saph despite a lot of the engine being scrap, and I still have loads of crap left (need to have a clearout!)