Yea, as it turns out, the majority of my deck is Gold Foil. I got suckered into Fray 16 (Silver league, Gold Foil) and I went on a transform-my-deck from no golds to all golds. Takes a bit of fun out the brawl, I miss having 9 or 10 battles to line up! But, from a guild point of view, it makes sense for me to lose some fun, and be able to compete in the spot. (I'd prefer Fray 15 - but can't always get what you want, right?)
I'm not going to worry about the general sale, will just pick and choose a couple of choice cards I need and take the gamble out of the process. Feels like might be cheaper that way, but I dunno, will probably have a moment when I just buy a couple and then open up shit and then regret it ;)