Samsung is currently advertising a 50% off on T-mobile S9 with eligible trade-in (Galaxy s7 series/s8 series, LG V30, Pixel 2, iphoneX etc) . Best bang for buck is offcourse trading in S7 series, but this is a YMMV deal, as my account (as will many others) for some reason is not eligible for the deal. But posted here in case somebody else can benefit from the deal.
https://www.samsung.com/us/smartp…/s/Device/