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Different economic systems can make for interesting variations and local colour in game worlds. We're used to a capitalist system with fiat money. Many fantasy game worlds use commodity money, such as gold coins that have intrinsic value - they are worth the same as an equal amount of gold not formed into coins.
You can also have a barter economy, where things are exchanged for other things according to the agreement of the transactors, in the absence of any form of money. Or a gift economy, where goods are not sold, but rather given freely to those who need them, without any expectation for reciprocation.
Then consider more fantastical or science fiction economies, such as being based on hours of work, or units of energy. To "purchase" something you need to trade time spent working for the seller, or give them an equivalent in energy reserves.
Information or data could be a valuable medium of exchange. To buy something, you need to offer personal secrets. In a magical or ultra-tech setting, time could literally be money: you buy and sell things in exchange for fractions of your lifespan.
Even more fun can be had by mixing different systems in the one setting. Heroes used to money will have to adapt when travelling if they find themselves in a gift economy or secret-trading economy where their dollarbucks are useless.
Commentary by memnarch (who has not seen the movie)
Kylo doesn't need to figure out where the necklace came from, he just needs to make his minions figure it out for him! That is a pretty quick turn around though. I didn't think that Star Wars had Star Trek level tricorders for analyzing objects. I suppose all movie-Kylo would really need however is to mindread Rey while she's distracted with the necklace loss. That'd amount to the same thing in the end, so no real change there.
And I guess the party split wasn't what I predicted. Looks like we had Rey and the droid duo, Poe and Chewie, and Finn looks to be missing. Though perhaps he's just off-screen to the left or right and had been with Poe and Chewie? Either way, I'm only a little surprised that Poe wasn't stopped from trying this ruse. No other plans were mentioned, and Jim could definitely try and sneak away for long enough to get started. And for gaming, failing at doing something is much more interesting than standing around doing nothing.
Transcript
Rey: That’s not good. What are the chances Kylo can figure out where I am from that?
[SFX]: ♪♫
{scene change: on board the Steadfast}
Tishra Kandia: Sir, we’ve had this analysed.
Tishra Kandia: It’s from Tatooine. Traditional Sand People design, from the Mos Espa region.
Kylo Ren: Prepare my ship!
{scene change: back to Tatooine}
Rey: Oookay. I try to find the others.
BB-8: In this crowd?
GM: You spot a commotion in the distance.
Rey: That’ll be them. Let’s go!
{Rey and BB-8 run and find the others}
Rey: What’s going on?
[SFX]: ♫♪
Sand Person Merchant: This man is posing as some sort of tax collector.
Poe: “Posing” is such a strong word.
[SFX]: ♪♫
Sand Person Merchant: We don’t even have taxes!
Poe: Exactly what someone hiding taxable goods would say!
Chewbacca: Of all the ill-conceived ruses I have witnessed, impersonating a tax official in an anarcho-tribal barter society...
Chewbacca: Well. It’s probably just barely inside the top ten.