While older, iPhone 12 deals are still a great choice if you don't mind opting for a slightly older, ... The best source for refurb (and discounted) iPhone 12 deals in general is Back Market.

iPhone 12: Apple offers up to $250; Back Market up to $372. iPhone 12 mini: Apple offers up to $200; Back Market up to $293. iPhone SE (2nd generation): Apple offers up to $80; Back Market up to $129.