I don't mind the RNG for the non essential stuff, vehicles for example. Sooner or later they turn up at the trader, might not be specifically what you want, but minibike, motorcycle, 4x4, Gyro all go brrrr. What I find frustrating is when my main build weapon is nowehere to be seen. The save before this I ran a fortitude build and when I stopped the save on Day 80, I still hadn't seen the steel knuckles. Then I start a new save using a different skill tree and the trader has the recipe on day 7. Once you max out a skill I think the drop rate on the recipe for the main weapon of that skill should be better.