I had a few of these given to me along with some planes and a large amount of parts. They belonged to my uncle who passed way. He was flying them 10 - 12 years ago so must have been purchased a bit before that. They have compression and I believe are fine as all other items have been. If local,
I recommend pick up as there may be accessories in amongst the boxes of plane gear that you could identify goes with the engine.
Check out my other items for another Saito 4 stroke motor. Happy to combine postage.