I have 278 decks stored in 3 areas.
This is my desktop and my organizer towers. All t11 decks get housed here (I have Tycoons (both colors), Artisans (both colors), Encarded Standard Backs, Copper Rarebits, Red Monarchs, Silver Monarchs, White Gold Monarchs (V1 and V2), Contraband, Virts SS 2014 (with space for my 2015), The Framed Deck, NoMads, Tendril Ascendant, Rebels, Medallions (V1 and V2), Red Jaqks, Navy Blue Monarchs, and Mystery Box (both colors). Center cardboard box has some generic bees, tally-hos, titanium bikes, etc. Top left is my White Gold Monarchs V2 brick and 13 t11 wristbands. Top right is a brick of bicycle seconds and a fat pack of inserts and jokers I kept over the past half year. Not pictured to the right is a Mystery Lockbox (super cool).
I keep these at the foot of my bed, these are different types of bikes (bottom two drawers) and some other custom decks.
This is my standard bike stash for gaffing or whatever I need. I keep it in a corner as I hardly use it.