I noticed a few game guides when I was browsing in a used bookstore today, and I was curious whether they were worth anything.
Ultimate Mortal Kombat 3 Arcade
Street Fighter Anniversary Collection - covers SF2 and SF3. Amazon has copies selling from $18 and there are no copies sold on eBay in the past while. I never know whether to trust Amazon prices on these things.
Final Fantasy X-2 Limited - apparently this originally came in a slipcase with a poster. They had just the book.
PS - if anyone here wants any of those, let me know and I'll snag them for you.