If you missed it a couple months ago, this deal has returned.
Amazon has the Pyrex Prepware 3-Piece Glass Mixing Bowl Set for $11.99 with FREE Super Saver shipping and $35 purchase or FREE with Amazon Prime.
Sizes include: 1-quart, 1-1/2-quart, & 2-1/2-quart bowls.
We are continuing to make the transition in our house away from plastic and to all glass or stainless steel, and this is a great way to do it on the cheap.
Pricing was current when the post was published, however Amazon prices change often, so please check before you buy.