That is one ugly color of airplane, I wonder if that’s even the paint or just some kind of anti corrosion coating.
The P-8 might well pick up contracts even from people not particularly interested in anti submarine warfare. Nations are ever more concerned about maritime patrol for countering illegal immigration, drug running, protection of EEZs, piracy and other missions. For those roles the radar/SIGINT/FLIR package on the P-8 and the P-3 before it are very useful. From what I understand the systems on P-8 are all to be modular, and the US is offering foreign countries the option of either integrating custom systems or pick and choosing what US standard features the model they buy actually carries. That should help attract orders, and control costs.