Do they all have the fixed GPU?
No - not all, but two "emerald-books" with the green dot.
I primarily got A1260s for me and for the option of home-office. Additionally a unit as a present for my nice, one for a friend
and also 3 very cheap units for spare parts (sold as partially defective or non functional).
Then I became aware, the GPU is the critical part and prone to fail ...
My nice happend to overheat hers MBP within 3 weeks (placed beneath cushions while watching streaming-video) and I gave her my 2008_13"_MB-unibody and got the "burned" A1260 back.
One of the defective units (only isight-cam defective and some bumps and scratches) turned out to be a gem - carrying the green-dot, what a surprise under the ugly hood!
Finally I managed to apply "my temporary fix" (AKA "Voldemort") on 3 defective logic-boards/GPUs (those ones meant for replacement) and I still have the initially purchased working units left on stand-by (one of them sports a green dot too) for the very occasion, that those revived spare-part-machines should fail. (Which hopefully won't ever happen - my father was a baker ...
)
You may call me crazy, but the whole stuff hasn't been more expensive, than my first Mac - a 2009 13" MBP - or any fully equipped workstation at the office.
I've learned a lot of lessons while here in the PPC-forum.