Origin is running discounts on their DLC bundles for Mass Effect 2 & 3!
This is the biggest discount on these DLC bundles I have seen so far.
Obviously these do require their base games, but if you don’t own those yet and intend to check the series, I recommend buying the DLC now and waiting for a sale for the base game, as it goes for super cheap pretty regularly.
ME2 DLC: https://www.origin.com/usa/en-us/…dlc-bundle
ME3 DLC: https://www.origin.com/usa/en-us/…dlc-bundle