I can say that I have never found a wind fan in the ML crypts before, and when I have found them else where they sold for far more than 1gp. 200-300gp with a decent appraise? I have sold one very recently, but it was before the hak updates.
I'd say they're bugged somehow. It's either that or the effective level of Gust of Wind on that item was lowered. It used to be either level 10, or 15. It was higher than the level you acquired the spell as a wizard at least. I'd say that even if the level was reduced on the spell that still shouldn't make it sell for or cost 1gp. Right?