There are a few things out there. Not sure which are still in print, but many should be available as PDFs.
Aurora's Whole Realms Catalogue - Not available on Paizo. Should be available from dndclasics.com as a PDF. Has a wide variety of mundane items and prices in categories (laborer's tools, wizard's workshop, bulk foodstuffs, wilderness survival tools). By far my favorite sourcebook of this type.
And A Ten Foot Pole - Not seeing this one on Paizo, either. I don't remember the publisher, and my copy is in a box somewhere. If you can find it, it lists items and prices by category, but goes a step further and applies time periods (stone age, bronze age, renaissance). However, take the prices with more than a grain of salt; for example, it adds in the "iron bit" as a lower-than-copper-piece denomination, and I don't remember if it uses the silver or gold piece standard.
A Magical Society: Silk Road - This one is available on Paizo. While this is mainly intended to help you create realistic trade routes, it has a massive list of commodities and prices. It includes an extremely thorough listing of standard commodities (gems, foodstuffs, herbs and spices, livestock, metal ore) but only certain categories of finished goods (pen and paper, vague categories for cloth goods musical instruments).