I have a plush Energizer Bunny,still in original plastic packing. It is a Christmas Promo from approx. 20-25 years ago. The bunny is wearing a Santa Hat and has an attached stuffable X-Mas stocking attached at the back. Can anyone give me an idea of the value of this collectible? Thank you.

Hi! Actually, I own one of these myself! I purchased one for my son back around 1993 so it's not quite as old as you think but pretty close. I see you say that yours is 12", the one I own is anywhere between 25 & 30" depending upon where it is measured from.
Now for the sad news-I don't believe these great advertising pieces have much value yet....I have seen these have a tough time selling at both live and online auctions so I would have to assume the value is less than $10.