I got mine originaly just to evaluate it. The part of this hobby I enjoy most is the Engines and I like to evaluate new engines on the market.
There was nothing sinister in me selling mine other than I don't fly that size plane much and I have a couple of (much more expensive) engines that more than suit me for the occassions where I do use this size of plane.

The PTE 36 is showing itself to be a very good contender in the size range (It seems that 30 - 35cc is the new 26cc) and represents decent value for money. Only time will tell how long they will last but from what I have seen so far, there is no reason to expect it to be all that short. The one thing that they don't respond well to is under propping as they tend to run "a bit ordinary" if not properly loaded.