Nice! I completed these just after the gym badge promos came out. Found a decent deal for the set as a whole. I also added the XY Base pre-release promo and four Evolutions pre-release promos even though they arent black stars because of most pre-releases being so.
My best find hands down was the 2016 Champions Festival. Got it for $20 or 30 maybe somewhere in between and they emailed me saying they only had staff ones left and i could either cancel or take one of them…you know what i did!