The Rookie's Guides will have some variance, but the 64 page ones will be $14.95, like our other books.
As for price increases, I think you will see it happening more often over the next few months. RPG prices have been fairly static for a great many years and have not grown with the costs publishers face. However, I believe more than a few publishers are beginning to wake up to the idea that they do actually have mortages to pay/families to keep, so you may see a gradual creep upwards, at least on hardbacks (whose costs are immense, in comparison to supplements). Before anyone flies off the handle (yes, we would all want gaming stuff for $1 a time!), I don't know of any publisher looking to gouge the market with their prices - they just want a fair price for their work.