My Hegner is about 20 yrs old. I did have a connector rod break, and for $80, I'm back and running. The construction on the Hegners is super simple, and all parts are available. If the motor itself is going, then your in for a very costly repair, especially if it is variable speed. Nothing Hegner is cheap, but almost everything is replaceable.
I have two Hegners and an EX, but tend to use and enjoy the EX much more. If I had to repair any of my saws, I'm most confident I could repair the Hegners. The EX is a joy to drive, but if it ever goes south and I have to repair it, I'm toast.
-----Randy