I'm sure someone has a more extensive list, but here's a couple I know of. The obvious one that springs to mind is our good friend in EC... The Shady Swashbuckler. His friend Bubar on the wall is on a different faction, but he crucially sells water so he's worth checking.
If hunting in Oasis/NK, I'm sure the gypsies trade with everyone? If not, Murissa Sandwhisper (or similar name) in North Ro in a small building near the Freeport ZL inn trades with Dark Elves, which is odd. Might mean she'll trade with lizards too.
Not so familiar with Odus or the Qeynos/Halas area but as a troll, even with warmly after some CB action I couldn't get any Kelethin or Felwithe merchants to sell to me and Felwithe particularly I was still kos to their paladin/cleric guild. Something to be careful of. Same problem in Kaladim, still dubious among the vendors and kos with certain elements.
Would be great to get a comprehensive list for lizards on here, I'm sure there's people who really know their stuff
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