How much would you pay to go from P10 pro to P11 pro 256gb?

As the title says how cheap would the 11 pro have to be to get you to trade in? I have some store credit along with the Google fi promotion, I could get the 11 pro for $140 shipped. While there isn't many upgrades this year, that seems cheap enough to just get a nice battery refresh along with all the other little things like new cameras and faster processor. Obvious downside being 4gb less of RAM. What do you guys think?