Massive thanks to [violet] and anyone else who worked on this update. The trading cards were a blast when they came out, and it's phenomenal to see them returning for the long run, especially with such quality of life features as 'collections' and this consolidated buy/sell screen. I look forward to cracking open some new packs... as soon as I'm done clearing space for them lol.
EDIT: scratch that, the standard card screen wasn't showing it, but some sub-screens (like specific cards and auction) says 'you have # unopened packs,' so it looks like the former.