Nick and I checked this out today- Nick is my technician ( he was Electrohome's production engineer for the G08, G05...).
His feedback is that there was a quite a few growing pains with the G08.
It started with some pretty severe "blow-ups" and burnt components.
One of the first fixes was the addition of the cooling fans that you see in the pix.
The ultimate fix was the addition of current limiters which led to eliminating the fan.
So I guess what we are saying is the one on e-bay is "mid stage"... considering it has lasted 25 years says a lot.
Idealy it would be of the vintage that did not require the fan but had the current limiting circuit...
In any case, probably a rare find, the price of $220 seems very good in a supply and sdemand market.
Good Luck
Rick Nieman
Rick@niemandisplays.com