Staff note: This post may contain affiliate links, which means Pentax Forums may earn a small commission if a visitor clicks through and makes a purchase. If you would like to support the forum directly, you may also make a donation here.
And it is not the copy I recently boasted about the other day
( I am keeping mine as a collector piece)
http://www.ebay.com.au/itm/Pentax-MX-Motor-Drive-Battery-Pack-M-Both-Are-In-...item20eed54de9
A very rare accessory indeed - it will be interesting to see how this goes as I am sure it will sell via auction