There are so many crafty stores out there. I will add to this as I remember others I use. Here are a few of my favorites:
By Lori Designs - Digi Stamps
From the Heart Stamps - mostly Digi, but you can buy some of Faith's stamps at Whipper Snapper.
Marker Pop - A Great Store for Copic Markers, refills, etc.
PaperTrey Ink - I typically only buy paper and ribbon from them. But they have a lot of good things.
Precious Scraps - If you are in or around Dover, Tennessee (near Clarksville, TN or For Fort Campbell Kentucky) - please go visit my friend Bev. The store's FaceBook page is HERE. So many classes and great product. I love Love LOVE this store (and her, and Cori, Lois and Tamney)...
Stampin Up! - this is where it all started for me. Love Love Love. They have paper, ink, everything.
StampingBella - Love!
Sweet & Sassy Stamps - Digis, Clear Stamps & Dies.
The Stamping Boutique - Digital Stamps
If you have any you shop at that you want me to add or if I've forgotten yours, please post a message and I will add it.