Price does not include shipping. I will charge what USPS.com quotes me.
PGM Motherboard with Knights of Valour Super Heroes - $150 (will not split up)
The original batter was corroding, so I removed it, cleaned the pcb, and modified the board with a holder to use a regular CR2032 non-rechargable battery. (thanks to Xian Xi for instructions) A fresh battery is included. Price is somewhat negotiable. The manual and board link cable are also included.
I will consider trades for more uncommon/rare Atari 8-bit or Atari 2600 items.