I think there should be basic versions of each weapon type that a vendor sells.
The reason I am saying this is this past week there have been 2 different Challenges given to get 10 kills with a specific type of weapon (Scythe and Spear).
I couldn’t complete them because at max level all of the drops I’ve gotten of those weapons were not usable because of my current Dex build, and their stats would have required a major respec, which I haven’t unlocked.