Your DM who has all the stuff already
I bet they don't have everything from Hydra Collective yet! My favorite is Tree Maze of the Twisted Druid--a rekeyed dungeon from when the author was but a wee lad--but the stuff with Luka Rejec art is a close second. These are the kinds of adventures you can pull out, reskin to your heart's delight, and have ready to run in under an hour.
You know how much kids love postmodern postcolonial weird fantasy author China Mieville and also me? Get them The Worst Breakfast. It's written by me and him and drawn by me and is about the most important meal of the day. Recently named one of Kirkus Review's top picture books of 2016.
A needle-eating dog with one ear and steel fangs
They need Hubris! A meatgrinder gonzo hatefuck murdering setting for Dungeon Crawl Classics. It's the new hot thing!
I read on a 4chan thread about her that she's a huge fan of the new Kingdom Death kickstarter, it's expensive but goddamn those miniatures are something else.
Your player who keeps falling asleep because you are a terrible DM
Keep sleepy's head in the game with a Maze of the Blue Medusa pillow here! Shipping is free from this site today only.
A guy you only know from cons who smells bad
Encourage long and contemplative showers with an intricate Zak Smith shower curtain! Same site: shipping still free today.
Someone completely fucked up
Keep them clinging to vague tokens sprinkled along the thin edge of their ability to interact with fellow humans with dazzling and enigmatic Scrap Princess merch
Give back to the hobby you love by helping to send Contessa to GenCon this year.