The Pixel 2 and Pixel 2 XL are both officially launching tomorrow, October 19 on Google's online Store and at Verizon. Verizon stores will also start carrying the Google Home Mini and updated Daydream View headset. Apple iPhone 7, 7 Plus, 6S, 6S Plus, 6, 6 Plus, or SE Google Pixel or Pixel XL Samsung Galaxy S8, S8+, S7, S7 edge, S6 edge, S6 edge+, S5, Note5, Note 4, or Note edge Motorola Z2 Force, Z Force, Z Droid, or Z Play LG G6, G5, G4, V20, or V10 HTC 10 or One M9 Note that this is the full list of eligible devices and not all of them will yield a $300 trade-in...
Source: https://www.gsmarena.com/get_up_to_300_toward_a_pixel_2_or_pixel_2_xl_at_verizon_starting_tomorrow-news-27803.php