Where to get track to add on

Just about any store...Walmart, Target, Amazon...track packs are not scarce.

I just did a quick search on Amazon and it seems they have a box-o-track for $60 for 172-feet of track! Never seen it before so must be part of HW's rekindling of the Track Builder stuff. That's a pretty good deal, and it looks like they're the high wall style that TRU used to carry. Interesting...