Question about Mechanics- is this the default go-to for Silhouette 0 species? Even looking at the Unofficial Species Menagerie and confirmed FFG products, IS Mechanics the right skill? After some reading and reflection, I'm inclined to offer Negotiation as their skill as traders. They find stuff (Utinni!) and sell it (Negotiation). IIRC, I never saw Jawas do much to build or repair droids beyond band-aid polishing in order to sell droids/gear.
They are nomadic and live in sandcrawlers, so they must have mechanics to maintain them. They're listed as being able to build droids from junk parts in the non-Legends part of their Wookieepedia entry.
I seem to remember they also create their own equipment (like the ion blaster they used on Artoo) out of junk parts.
It seems like Mechanics could be a big part of their culture, but more in the sense of knowing how to recycle junk into something useful rather than building sophisticated machines like starships. So perhaps it's better for them to just have a talent that reflects that sort of behavior rather than the general Mechanics skill.
On the other hand, making a Jawa PC and then adding on the Mechanics skill would make a decent overall tech guy.