vv221: As far as I remember no Stellaris expansion has ever seen a better discount than -50%.
So the current packs seem to be the best offer we got so far.
As I mentioned in an earlier post in this thread, there was a significant discount on everything in a special discount email with Redeem codes, sometime last year I think it was. I've never played the game or owned any of it, yet I got that email, and my memory says it was something like one or two packs that contained everything, though that wasn't clear to me until too late. Anyway, the price for everything, as I recall it, was probably around what I have just paid for the three packs of this thread, but the base game was also included, and perhaps the Soundtrack etc.
The one or two packs were uniquely named, and only available during that discount email window, and disappeared from store listings after that. If there have been new DLCs released since then, then of course that offering would now be deemed incomplete.
There is a thread here somewhere, where I made queries and got answers, but alas too late ... perhaps in the Stellaris forum.
P.S. I think there was also other Stellaris discounts in that email, so it may be the one that gogtril34987 is referring to, though I would have picked earlier in the year. Anyway see some of this as a loose memory recall.