>>3711563Like other anon said, now is a good time to get a New one if you can afford it.
For lenses depends on what you're looking for.
If you're looking for an all around zoom kit lens that's cheap, the 18-55mm is very good. It's 2.8 on the wide end and is a good quality compared to your usual 18-55 kit lens. Used go for $300 easily.
If you want something with a little more reach, getting the 16-80mm bundle with the x-t3 at $1500 is a very good deal. At full price alone($900), I wouldn't recommend it as readily, but when you get it in the bundle it's very worth the extra $500. Very good OIS(6 stops). There's some focus breathing issues so zooming in video isn't the best but okay if you zoom slowly.
The 16-55 2.8 is their premium lens in this range. Is much heavier and expensive. Great if money is not an issue.
For Primes, there are 3 primary focal lengths they have: 23mm, 35mm, and 50(56)mm. And they all have an older version which is f/1.4(1.2 on the 56mm), and a newer cheaper/smaller version which is f/2. So first pick a focal length, and then pick if you want the old or new version.
Remember it's crop so
23mm - Good for street shooting, catches a lot of the background environment, easier to work with indoors and close spaces
35mm - Somewhere in between
50mm(56mm on the older one) - Good for portraits, blurry backgrounds with bokeh
As for the old vs new.
Old lenses:
Opens wider(f/1.4)
Bigger and heavier
More expensive
Slower autofocus
Not weather resistant
I'd say the newer f/2 lenses are the better choice across the board as long as you can give up the extra stop of light.
There's also an XC line of lenses they're releasing now which are super cheap but I'm not fond of the build quality and they lack the aperture ring which is part of what makes fuji fun to shoot so I would stay away unless you just want something cheap that works. Image quality I heard on them is not bad.
Image from this youtube video:
https://www.youtube.com/watch?v=t95kLXAUtZM