Thanks so much to reader @prettyinpink__xoxo on Instagram for this tip!
Did you know that you can get 11 Tony Moly Sheet Masks (these usually retail for $3-$6 each) for $11 on Amazon HERE? I believe this set was sold out for a while, but I'm happy to tell you it's back! Shipping is free if you have Prime (your order must be at least $35 to receive free shipping on this if you don't have Prime).
If this sells out again by the time you see this, don't worry--it seems that the seller restocks frequently so just add it to your wishlist, shopping list, etc. and keep checking back.
PS: I also want to mention that, if you're new to Korean products, the dates on the packaging are manufacture dates, not expiration dates. I freaked out the first time I purchased Korean ice cream and thought that I was eating food that had expired 4 months prior, but my Korean friends kindly pointed out to me that the date you typically find printed on manufactured Korean goods is the date of manufacture, not expiration.
Thanks again, @prettyinpink__xoxo, for the great tip!