Hey Jimbo.
Just a correction on the PicassoIV.
Your line, "This unit is in great shape but due to its age is sold as is with no warranty. Flicker fixer is still attached to the card." is slightly Incorrect.
Flicker Fixer was NEVER detachable. What you are referring to is the Graphics slot adapter, which in different Amiga models was located in different parts of the main board, so was detachable and reconnected by Ribbon Cable.