What are the various ways to obtain Daedric armor?
I've come across a couple of armor pieces as loot (one was enchanted with Peerless Health, and the other was unenchanted). I don't have the Smithing perks to make a set. Are they mostly random loot drops, or will merchants sell them as well?
I haven't run into any shop keepers that sell Daedric stuff. The only place I've found Daedric is at Mehrunes temple & one of the Hagravens. Mehrunes temple respawns about every week or so. You'll know when you approach as you get attacked by two Dremora.
Then inside there are sometimes 3 more. That's the way I collect the hearts for smithing.