My retainer found something interesting...

[Kat_Manx]

Already been disputed. We previously thought they could only bring items that arent Blue rarity, but with primal weapons dropping out the wazoo, its only a matter of time someone gets a High Allagan chest and everyone will bash that person for having the wtfiest luck on the game.

Um, that's kinda what I said. That there is no known limit. It however doesn't dispute the fact that there MIGHT be a limit, or that there could be tiers or rarity as I suggested, which in the less rare items are simply given a lower chance for you to get.