I'll continue buying a single box of a series that I like, but the math just doesn't work out anymore. $250 for two rare chase, $25 for the common chase (after prices settle out) and being generous $50 for a set of six and dropping $500 doesn't make any sense. I still have commons from Series 7 and 8 that I've never unloaded so why bother? If I were in an area say like Minnesota where I could more easily move singles, then yeah, maybe
I think the Fett collection might be one where you could sell (spare) stuff off fairly easily, but even at that, I'll stick to my one box just for the fun and excitement of having a shot at a chase figure. But those odds are low for sure. I've ordered 5 single boxes I think and didn't get a chase until series 9 with the two yellow clones. I know others that have had better luck though, but it is still a crap shoot.
I do still hope for some chase in the Fett collection, even though they'll be pricey if they aren't in my box of 12. They could be quite cool. I believe they'll be there and I'm getting fired up about this especially since I didn't order anything from Series 10.