I used to collect too many things, Gundam, TMNT, Zoids, LotR Action Figures, Masters of the Universe... I even got into Digimon action figure collecting. I found dumping off 95% of those collections helped me in the long run to better appreciate my two mainstays, Transformers and GIJoe.
I got rid of a few TFs three or four years ago, but now I find I might want to get them back... For me I think Transformers is my one continuous Collection, unlike GIJoe or even Masters of the Universe which I'll admit a few pieces more would be nice to have I'll never stop collecting Transformers.
I have decided not to get into Animated and in fact have made plans to complete to my exacting specifications only the series I have already from G1 to the current Movie line. As a collector things just need to calm down... Of course if I was still actively collecting at the moment I might feel less inclined to go crazy with my displays.
Anyway, it's all up to what you want. Right now I have over 600 figures in fact it's closing in on 700 and yet I still want more, Transformers for me is fun, in a way not having any money right now has helped me to appreciate what I've got more, but in some cases I still get the urge to blurt out my major Wants lists when I'm eyeballing my collection.
I could never part with them, even if it meant having a grand in the bank for the whole collection, I'd regret it way too much, even if I dumped off everything I'm still hoarding in certain respects from all other collections including the vaunted Star Wars figures I've kept I could never bring myself to part with Transformers.
They have constantly fueled my imagination, even as late as 16 I was actively playing with them, that's how I lost a couple missiles.
And even if I do manage to get the best damn job imaginable with enough yearly income to finish off every single series from G1-Movie/Universe/Classics 2.0 I wouldn't dare get rid of them because I still have great plans... For starters there's the massive display room I want to build to make it look like a cross between Earth and Cybertron. (The shelves, not the room itself.) Not to mention the possiblity of more great Fanfics that could be born.
Uh, so yeah, selling off Transformers, not going to happen. Everything else is fair game maybe eventually, after all for me, it's always been about More Then Meets the Eye.