>>6095835A loose, pure white Leia with cape and blaster sells for 15-25 dollars depending on how white she was and if the cape had any tears. I would pay 25 for another one in better condition than the one I have. I don't know what the going rate is now that Fisher is dead. There are literally a million of them in existence, so just wait until the price settles. At the furthest extreme- for a perfect figure, AFA C-8 quality- I would pay $35 before her death, maybe $40 after.
The yellowing is a big deal. You can look up ways to prevent it, but honestly, if it hasn't yellowed in 30 years you probably have a piece that is in good enough condition to be worth paying more for. It's all about the plastic used during production and has very little to do with sunlight or other conditions (except cigarette smoke). Put it in a plastic case just to be sure.
For figures on the card it depends on the logo. If it is a 12 back, good condition sealed card it could go up to $600 (I've seen them sold at that price before). Typicall they sell for $150-$350, but that depends on creases in the card, yellowing bubbles, and things like that. I imagine those 12 back MOC figures will be doubling and tripling because of Fisher's death. The other logos are a little harder to gauge. I would say the Princess Leia Organa (white dress) figure on any other cardback would still go up in price, but nothing like the 1978 12 back. You could probably get a 21-back for less than $100 if you can tolerate a crease in the card.
Good luck.
