Surviving Mars Bundle is the base game plus all DLCs except for Below and Beyond for $10 which is pretty good.

Surviving Mars ($30, Owned)

Deluxe Edition Upgrade Pack ($10, Owned) - skins, background music, and art book
Space Race ($13) - sponsors, which provide events, items and missions
Green Planet ($20) - terraforming

Colony Design Set ($5) - 25 new buildings
Project Laika ($6) - 8 domesticated animals
In-Dome Buildings Pack ($5) - 8 buildings

Marsvision Song Contest ($4) - background music
Mars Lifestyle Radio ($4) - background music
Stellaris Dome Set ($4) - dome skins

For me it's $61 of DLCs for $10 and even if you remove the skins and music it's $49 for $10 so I guess still not bad.