This highlights two campaign questions, though. First, the commoditization of magic. That's a ship that, by RAW, I'd say has sailed. PC's are pretty much assumed to have access to whatever they might wish to purchase. So a temple making big "donations" from curative potions, or CLW wands. seems pretty plausible.
Second is the prevalence of adventurers - are the PC's a rare breed, or are adventuring parties commonplace, basically competing for adventurous missions? That one isn't really covered in the rules, or even in all settings (certainly some settings, but not all). It seems hard to credit the huge magical economy building up without a large adventuring population to create the marketplace, but then enchanters might sell most of their wares to military and security forces (not too many adventuring parties in modern North America, yet guns aren't hard to find) and other, more "mainstream society" users of a lot of magical items. If most purchasing is done between adventures, during reasonably lengthy down time, the items could be custom made, rather than snatched off the shelf, which would allow for a much smaller magical economy. But surely the PC's can't be the only customers!
