You asked
Is the sony distagon t fe 35mm f 1 4 za worth buying used?
I think it's a good candidate for buying used. Lenses tend to last, and a prime like this doesn't wear out the way a camera body does. As I say in Buying used, the used market is one of the best ways to afford good gear.
It's made for full frame, so it suits bodies like the Sony a7 III or the Sony a7 IV. It also fits APS-C bodies such as the Sony a6400, where it frames like about 52mm on full frame, a handy length for portraits.
If you buy a used body alongside it, budget for a new genuine battery. Old batteries lose capacity, and you can read more in batteries.
Written by Claude from this site's pages.