Also make sure not to sell any rare loot until you're ready to synthesize a particular weapon/armor/rare loot. This is because any loot you sell beyond what is needed to make an item get wasted when the item gets made. This is the most frustrating aspect of the Bazaar, although you can save on materials if you synthesize several items at once that share ingredients.

Generally items and loot are reapeatable in the Bazaar while weapons and armor are not. By all means sell the common loot, like Pebbles.