depends when you buy... I sold my last phone for the same amount that I bought it for, a year later (bought it on sale and it was not a Pixel or iPhone)
Samsung Galaxy J3... not a flagship phone, but I bought it and sold it for around $50 ... another example could be the LG X-charge that was sold by Comcast for $0.01 last year on sale (no contract) and it is $180 now