Original Art for Sale

I don't know historically how much original Winsor McCay drawings have been going for, but I recently saw these two pieces of animation art for sale in an auction. Curious to know how much they're worth? The Gertie had a starting bid of $7500 and the Lusitania was $8000. I would have expected Gertie to be the higher of the two, but I bet McCay's signature raises the second one.

Makes you sick when you think of how those drawings were treated in McCay's films. Remember in the "Little Nemo" and "Gertie" movies when, as a gag, hundreds of McCay's drawings get dropped all over the floor and trampled? As I understand it, those weren't props - those really were his actual drawings... They had already been filmed frame by frame of course, and no one saw any need/value in the actual physical drawings anymore.