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Credit to @PapaGs Deals. Seems like a great price if you want a copy on Steam.
I'm 99% sure that adding all the bundles is the same as the Complete Edition at Steam, which is currently $33.07 at Steam. Each DLC is available individually if you want to purchase separately as well. Please let me know if I've missed something.
This is not an all time low, but I think it's a good price. SteamDB
The base game has been in a lot of bundles and is often reduced:
https://isthereanydeal.com/game/this-war-of-mine/info/
https://barter.vg/i/432/?
I wouldn't say this is much of a deal tbh