Walmart has $150 off the entire Verizon Galaxy S10 lineup + free Galaxy Buds (S10/S10+) with reservation at Walmart - 3/3/19. This is taken off the price of the phone when using Device Payment and not issued as bill credits.
To clarify, I went to Walmart Mobile today to clarify and they told me that this is the case. Sale could be lower or even higher for other carriers.
"Limited-time offer. Offer valid on new eligible Samsung Galaxy S10 activation purchased via a device payment agreement. $150 is a reduction of the cash price (excluding tax) financed in device payment agreement. See Walmart Associate for offer details. © 2019 Verizon Wireless."