I have a Malta which has done excellent service for almost 10 years and is still going strong. I think that the Malta is an excellent piece of kit.
If you were in the West Country you would be very welcome to try it out but I would have thought that it was a bit dodgy buying a second hand motor when you are as far away as Oman. How would you get it out there?
My only reason for letting it go is that I want to move to a new 4-stroke. I believe that Yamaha don't produce 2-strokes any more.