And maybe it's not an entire line. Maybe you'd go figure by figure. I think for example that Cybertron is a line where I'd sell some figures but keep others.
Eras I can't see selling off:
- G1, including E-hobby and other reissues. These are by far my sentimental favorites
- most Universe figures I've bought, because they're updates of G1 characters. Really, just about any new version of an old figure that I like is unlikely to go
- RID - some of my favorite figures ever come from this line
- Armada - I've got a lot of fondness for this line
- Beast Machines
- Animated - not because I'm a big fan, but because I only bought three figures from the line, so I only got ones I really wanted.
- Titanium
- Alternators - The one line I've tried to collect every last figure from. Still have a few to go, but I'll get them one day.
Possibilities:
- Beast Wars - as much as I like the show, I can't say I'm all that attached to most of the figures. I think I'd pick and choose
- Energon - I only have a few of these anyway. The smaller Energon Megatron already went the Ebay route a few years ago. I liked him fine, I just wanted the money for other things. I can see some other figures going the same way.
- Cybertron - a good line, and I wouldn't sell all of them, but again I can see picking a few figures to sell. Primus isn't going anywhere though.
- the movie lines: I'd keep a few of these that I'm most fond of, but I can see clearing a lot of these figures out. Would they sell? That's the question.
I'm sure I've missed some, but this is kind of how I break things up in my mind. Really, it's tricky because I've never been a completionist. I always buy just the figures I really like, apart from the odd impulse purchase. It makes it harder to purge the collection.

