Im going to sell my xxx-t, and with the extra money (only want to spend about $160 so I can get some other parts/tires) I am going to get a new engine. This is going in the 8ightB RTR with jp-3 pipe. I seen some killer deals going on the rctech for sale/trade forums now. One is the RB S5 with 1/4 gallon on it. I know him pretty well so I know the engine was broken in correctly. $160

Next is the RB S5 with 1/2 gallon of 20% on it. The seller is asking $135 shipped for it. On that ad, he is also selling engines like the ws7, v-spec, and os speed, so I think he knows how to break in engines.

So out of those 2, what would you buy? I have my mind set on RB, for longetivity, ease of tuning, and power.