Here's some of the sale classes that are on my wishlist:
Crafty Crochet Embellishments On Sale for $9.99 (Regularly $19.99)
Learn to crochet flowers and leaves along with applying motifs to things like pillowcases and towels. I'm a sucker for crochet flowers, but have yet to learn how to make them.
Homemade Italian Pasta On Sale for $19.99 (Regularly $39.99)
Learn to make homemade pastas? Who wouldn't want to learn. If I had the pasta attachment for my Kitchen Aid mixer I would totally be signing up for this.
Mixed Media Essentials: Color Design and Texture On Sale for $19.99 (Regularly $29.99)
Mixed media is something that intrigues me, but I never know where to begin. This class teaches several different techniques, and it looks like they break it down enough that even a beginner like me could take it.
And of course, Craftsy has more than 30 free classes you can check out. Learn to make pizza, birthday cards, zipper pouches, and everything in between.
Note: All links in this post are affiliate links, but I would never endorse something I don't believe in or wouldn't use myself.