Go to the auction.
Auctioned: CPU slots 2-240 000 credits or CPU slots 3-740 000 credits or CPU slots 4 do 1,240,000 credits.
Then sell it and earn the credits.
CPU slot 2 ---- 250,000 credits.
CPU Slots 3 ---- 750,000 credits.
CPU slots 4 ---- 1,250,000 credits.
(Sale prices are inaccurate, except maybe the last one.)
Google Translate translated from Czech into English.
I hope that I have helped with earnings credits. You can do this with every product in the auction.
Good Luck and Have Fun.