The Freeze frame was never made even in proto form from what I've read BUT the cardback WAS made.  Here's a pic of a mocked up vader with removable helmet on a ponda baba FF card.  The freeze frame would have had the picture that is on the cardback in it.  This is the ONLY ponda baba cardback i've ever seen and I doubt the owner would ever give it up.

The stormtrooper, obiwan, and yoda weren't too hard to find back in the day.  I found all three at retail.  There are several others that were tough to get.   The next easiest to find would prolly be the r2.  It ONLY came on a canadian card with a slanted/stand up bubble however (anything else is fake)  There's also a leia, vader, tie fighter pilot (i think) and maybe one or 2 others and they can all be proven to be legit by having a certain datestamp(only a few people know these datestamps and are reluctant to tell as they are so easily faked).  I also recently saw a pic of a lando with a slanted bubble and holo sticker (CRAZY and only one has ever been found)

Edit:  My count for these in my collection is:
2 stormtroopers
1 obiwan
1 yoda
1 canadian SUB r2d2

 

Supposedly it IS Carnor Jax.  This info is coming from the admin at RS who first leaked the rumor that Kir Kanos would be an exclusive for this year and supposedly he said he'd already hinted at this in February but I guess I never saw that.

 

I would take a koenigsegg please.  That or a ferrari enzo (heck any ferrari as I love them all)  A pagani zonda would be nice too.

Commander Cody- Several
Scorch- more than 10
Utapau Clone- more than 20

I live in a pretty good area