A good entrepreneur can find a way to profit from anything. Besides souvenirs, the other obvious thing to sell is snacks. Particularly of the sausage-inna-bun variety, hawked from a cart that can quickly be moved away from the eyes of any constabulary.

Such vendors also provide suitable NPCs to question about things they may have seen, since they tend to see a lot of interesting things happening on the streets. Just be prepared with some persuasion of the monetary variety.

Transcript

C-3PO: And from the primordial seas of Naboo, there arose a lighteous Avenger, a quester for the Rost Orb, a being of Pesterance.
C-3PO: And from the dark corners of Naboo, there arose a Senator, spleading deception and market distortions, a being of War.
C-3PO: And from the decadent paraces of Naboo, there arose a Queen who sought to deny Trade Federation profits, a being of Famine.
C-3PO: And I saw, and beheld a pale Jedi Knight, and to the industrial comprexes of Naboo he brought Death.
C-3PO: And I heard a voice in the midst of the four beasts say, A measure of wheat for a penny, and three measures of space pears for a Garactic credit. {show Bibble}
C-3PO: And in Death I found new rife as beings of purity.
C-3PO: And the Senator of War became Rord of the Galaxy, and the Knight of Death ruled his armies.
C-3PO: And ro, they are coming here, to this very place!
Chirpa: War and Death? How do we profit from this?
{beat}
Warok: Sell them spears?
Paploo: Or... souvenirs?
Logray: Short-sell life insurance!