Hello Daniele, to answer;
1)
I see it on Directron site for $99. They have a case/power supply for $99.
2) I have the ATI Radeon 9250 (GV-R25128DE) paired up with my Efika 5200B, and as far as compatibility goes I have not had a problem.
If interested, I will be selling my Efika 5200B system, which is turn-key with case, power adapter, efika 5200b board, vga card (ATI Radeon 9250), and MorphOS (2.7)/with License Key. Asking $249+shipping. I will supply photos upon request. I will be upgrading the version of MorphOS to 3.1 before shipping.
Thanks,
Mike