CoG/HG has an internal rubric for game pricing, which I believe is based on word count. If the game is released under a popular IP like World of Darkness, that bumps the price further. I made this pricing chart a while back, but it is not official, and I make no attestations regarding its accuracy.
When talking with Jason about publishing my game, he did confirm that they used a price-based rubric. He said I was free to suggest a price, but I would need a very strong reason to deviate from the rubric.
Never say never. 
Aether’s WIP didn’t get much attention on the WIP thread, yet it went on to become one of HG’s top sellers.