I have that one on the current Dalton Extra 300 that I fly. I got a new DA 200 L for this one (extra 300 SP), which will require breaking in. The DA 200 ML on the Extra 300 ML, has over 310 flights on her, over 60 hours of operation. It is a smooth running motor!
Cannot go wrong with that motor. The one the gentleman is selling looks like a nice one, and it is a deal, since he is including the headers and No-Flows.