BTM_Pix, great find!
HG-11 is the handgrip, coming it at roughly 60 USD, while HG-21 is a much larger one for about 100 USD
LVF-11 is the LCD viewfinder attachment for roughly 300 USD
BPL-11 is a very small baseplate
CN-21 and SAC-7P are DC and AC battery adapters, while BC-71 is the battery charger, strange, that these wouldn't be included. CR-41 is a remote trigger, maybe more useful for photography.
Would be really interested in the lens adapter pricing, MC-31 (PL) and MC-21 (EF)
images can be found here btw