Haven't heard of that one, built there is a gold (or gold and silver) Sandtroper that is limited to 200. It was a Lucasfilm gift to whoever was really lucky. The bottom said Happy Holidays and # of 200 and the Gentle Giant info.
I think I saw that one in an auciton, and I saved pics. I'll post when I get a chance. Don't know what it sold for, but the asking price was insanely expensive. $1000 methinks. Frankly, I think thats just an artifical inflation due to popularity if GG and imposed rarity. I mean, you could buy one of a kind movie props for less than that.