> An Efika board is around 200 Euro.

Depending on where you live (international shipping charges) a new Efika 5200B board has been purchaseable for (converted) 62 to 83 EUR (currently 70 EUR) for the last 3.5 years.

https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=5549&forum=2
https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=6256&forum=11&start=2

> You need a harddrive, a powersupply and a case.

Yes. Efika 5200B board + case + PSU is (converted) 120 EUR currently. 2.5" PATA HDD (about 20 EUR new) and PCI Radeon 9250 graphics card (about 30 EUR new) would make a complete Efika 5200B system about 170 EUR, completely with new (NOS) parts.

https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=6256&forum=11&start=9

> 1.5MB mini.

;-)