This is definitely not a 20 under $20 list.  It is a small collection of some of my favorite things on one of my favorite apps: Keep.com

Keep is a shopping app that shows you exactly how much the items you covet cost, and where to find them.  You can also purchase directly through Keep using their universal check out system. 

Admittedly, I haven't actually bought anything yet, but I do find that the selection is a bit more curated than sorting through Pinterest, and I have discovered lots of new online shops that I would not have otherwise known about.  Happy Shopping!