Stuff I'm vaping right now is 2 years old. It sucks. Some of the THC degrades into other less psychoactive cannabinoids at that age too so not even getting the full effect from it, mega lame lol.
I've heat pressed my own weed a few times with much lower cost heat presses and have had varying success with it. Some mediocre, some some of the best dabs I've had lol. But that's pressing flower, not hash even