MOST deals on EBay are OK. Just make sure of the value. Compare the cost PLUS shipping of the engine NEW against the price PLUS shipping on Ebay. I have gotten some good deals on EBay and RC Universe.

Personally, including what the person wants for shipping, I won't pay over 60% of the new price including shipping. The warrany is worth something to me AND you do not know how the engine has been broken in/treated. I have had good luck. The engines I have purchased have all been good.