Reminder that Oakfirst is giving the Exemplars a deal when you guys choose to sell items. He'll get you 60% of an items value instead of the standard 50%. You have to go through the Elites, however. Since the barracks in Old City is suspect, you'll have to make a trip to the Military District to get the deal.
Also, you'll want to invest in some pearls for identify spells. I'm not going to have you hunt through all the markets, however. Vinny should be able to get what the group need in the Wizard District. You can choose to try to hunt for deals from gem merchants elsewhere in the city but that will take more than 12 hours.
Of course, like before, you can use Spellcraft to identify certain items. I'm not going to make you roll for all the potions.
EDIT: The PCs would need at least 20 white pearls work 100 gp each. Or, if you can get a NPC with Analyze Dweomer (which lasts 1 round/level), a ruby or sapphire worth at least 1,500 gp.