And for items, why don't we just teleport back to the city using the nifty new Enveloping Pit, and go shopping? I might be missing something about the wish economy. The entry in the Book of Gears seemed a little sparse. But can't we just assume entry into that tier of activity just by selling our old stuff with liberal application of Charm and Suggestion to get favorable deals?
Here is a post of Frank's I dug up a while back (from the Paizo message boards, I think...) about D&D economics and the rationale behind the "Wish economy". It is kind of long, but it is a fun read if you have time and are interested.
Edit: Ah hell, it looks like it is just an abridged version of
what got put into their SRD, and which I'd already linked in the house rules thread. So I'm just going to delete it and leave this link instead.
The information about changes to the Wish spell itself are probably more informative from a practical standpoint. Combine these with the description of "chain-binding" efreet from my earlier post, and you can see how once you can summon an efreet (or other wish granter) and slap him around/bribe him/whatever, you can get as many magic items as you want, as long as they are worth 15,000 gp or less.
So basically, here is the abridged version of the rules of the "Wish economy":
1) Once you can gain access to even a single Wish, you can use that to gain more Wishes by using it to call something that can grant more wishes, and use one of
those wishes to call
another one of those wish-granters, etc.
2) You can wish for any magic item worth 15,000 gp or less (or non-magic item worth 25,000 gp or less) with no XP cost to the Wish granter (or person casting Wish).
3) So once you gain access to Wish at all, you can have as many items worth 15,000 gp or less as you want.
4) People don't sell magic items worth more than 15,000 gp for money, because if they actually have any magic items that are that powerful, they almost certainly know about the "Wish economy", and they can get all the money they want for free via wishes, but they
can't get these more powerful items for free. So those are the items that
actually have value to characters that have entered the Wish Economy.