This season I got a golden snowfury giant, and I do play overload shaman, so it's hard to decide whether to dust it. Usually it's something useless like blubber baron.
Keep it! Overload shaman is underrated with a very solid and flexible win condition. Plus, Spellstone onto golden giant means a board of golden giants! But if you already have an idea of how you want to use that 400 dust, dust away. I only keep golden cards if I use them and it's minion, and I know I'd keep snowfury giant.
I got nerubian unraveler. Easy dust.
Yeah, love spellstoning me some giants. Don't really need the dust so I'll keep him for now.