So I've improved the first few location pages of the wiki by adding an infobox to them. If anyone wants to carry on improving the location pages while I sleep, said infobox (with documentation) is here:
http://capx.wikia.com/wiki/Template:Town_infobox. Remember to also look at the done pages for examples.
Part of this has made some new information readily accessible: the items you can buy from a PokéMart. See attached (and Tremol Town's page). It seems like something you guys would want to change, either to make things harder for the player or to add town-specific inventory (mail? Poké Balls?).
Before you ask, no, it's not possible to change the prices of items in certain shops - prices can only be changed universally. Sell price is half the buy price, and that's also fixed.