Right now on the Groupon.com site, you can get the original Beauty Blender (not to be confused with the various dupes that Groupon has been offering for a while now) for $14.99. As you probably know, Beauty Blenders are $19.95 pretty much everywhere (Sephora, Ulta, etc.).
Usually Groupon offers everyday free shipping on orders $24.99+, but they seem to be running a free shipping promo right now. After I placed just one Beauty Blender in my cart and started to check out, it showed that shipping was free (and no sales tax)! I don't know how long this promo will last, but just make sure you enter your shipping info and hit "calculate" to see if it works for you.
Thanks again, @chloe.cosmetics, for the great tip!