Despite being a shelf-warmer (at least in my side of town), TR Breakaway is a "rare" figure.

TR Breakaway was short-packed in wave 3 (1 unit per case of 8), which is understandable since he was a repaint. Non-completist collectors would probably only buy the first or best version of the mold and ignore the repaint. Similarly, Quake and Krok, who are also repaints; were also short-packed (1 of each in a case of 8). However, unlike Breakaway, Quake and Krok have been included in revision wave where they are no longer short-packed (2 of each per case).

To put it elegantly, TR Breakaway was short-packed in wave 3 and hasn't appeared in any other wave, which makes him the rarest figure in Titans Return at this moment.

I wouldn't recommend buying a figure just because of it's rarity, and you should only buy it if you like the toy (or the character it represents). Even a rare toy can be a bad one that nobody wants.

Personally, I don't think TR Breakaway is a bad toy. The mold design and transformation is solid, and the choice of palette is decent. The most glaring problem with it is that it has a very incomplete look about it. As if Hasbro originally intended for more paint applications but had to excluded some because of budget constraints.

This leads me the speculate that if they do re-release the figure in a revision wave, there will probably be running changes to the figure where there will be more paint apps (depending on Hasbro's financial performance). It'd be a similar story to the RTS Legends Starscream figure released in 2010. Of course, this is a very big IF.