I have a new Tekin Mini Rage 6800kv motor and ESC to offer for $125 shipped. It's brand new and I have only just installed it into my M18. I had it out last night for one short zip on my club's indoor carpet track and it is bullet fast on 5-cells. WOW! It would be ballistic on 6 or more cells.
Here are some links to what it looks like installed in my Xray M18. Comes with the original box and manual.