WTS -Ninja 90/4500 tank, hydro was 10/11 so a few months left. Small chip in the shell but does not at all affect function nor is it a hazard. Looking for $125 shipped. -Ninja 50/4500 tank, hydro was 04/11 so again a few months left. Looking for $110 shipped. -Firebase regulator with Amped line. Functions and works perfectly fine. Looking for $115 shipped. Prices not set in stone.