My Stash
This list looks a little bit off, but it's about 412 skeins:

9 skeins Schachenmayr Catania
10 skeins Rowan cotton 4-ply
10 skeins Filatura di Crosa Clips
10 skeins Noro Spring Garden
10 skeins Indiecita Alpaca
10 skeins Elsebeth Lavold Silky Wool
10 skeins Jo Sharp DK Wool
8 skeins Cascade 220 Superwash
8 hanks Noro Kabuto
8 skeins Classic Elite Gatsby
8 balls Tahki Cotton Colori (5 black, 3 pink/red)
8 skeins Merlin Camelot
7 skeins Rowanspun 4 ply
7 skeins Dale of Norway Sisik
7 skeins Brilla in off white
7 skeins Cotton Ease in Red
7 skeins Peruvian Collection Sierra Aran
6 skeins Knit Picks Shimmer
6 balls Gedifra Stripe
6 skeins Mango Moon Wooly
6 skeins Araucania Nature Wool
6 skeins Berocco Softwist
5 skeins Crystal Palace Summer Net
5 balls Endless Summer Lara
4 skeins Filatura di Crosa Brilla
4? skeins Noro Spring Garden
4 skeins Knit Picks Merino Style
4 skeins Brown Sheep Lamb's Pride Worsted
4 skeins Cotton Frappe
4 skeins Rangeley 2-ply
4 skeins Regia sock yarn
4 skeins Art Yarns Handpainted
3 hanks Ami Ami tape
3 hanks Mountain Colors Mountain Goat
3 skeins Arucania Nature Wool
3 skeins Brown Sheep Handpainted
3 skeins Artyarns Supermerino
3 skeins Red Cotton Ease
3 skeins handpainted merino wool
3 skeins Cascade 220 Quattro
3 skeins Target brand railroad yarn
2 balls Debbie Bliss Soho
1 skein Crystal Palace Labrador
2 skeins Bon Bon Lipstick
2 balls GGH Goa
2 skeins KP Sock Garden *being knitted
2 skeins sock yarn
2 skeins Wildfoote sock yarn
2 hanks ArtYarns Ultramerino
2 skeins Cherry Tree Hill Supersock in Wild Cherry
1 skeins Cherry Tree Hill Supersock in red
2 skeins Cherry Tree Hill Supersock in Northern Lights
2 skeins Opal sock yarn
2 skeins Nature's Palette
2 skeins Lorna's Laces Shepherd Sock
2 skeins Brown Sheep Wildfoote
2 skeins Fortissima colori sock yarn
2 skeins Lana Grossa sock yarn
2 hanks Ellen's Half Pint Farm merino/wool
2 skeins Noro Kureyon
2 skeins ArtYarns ultramerino
2 skeins Regia sock yarn
2 skeins Webs yarn
1 hank FurrYarns MaineBear SOX
1 hank Tuile
1 hank Habu Shoshenshi Paper
1 skein Regia sock yarn
1 large hank Newton's Country wool
1 hank Newton's Country polyester (?)
1 skein Glow in the Dark Yarn
4 skeins Noro Cash Iroha
1 ball Dive Fiamma
1 skein K1C2 Tartlette
1 skein "Sable" Rowan Cork
1 hank Sassenach sock yarn
1 hank No No Kitty sock yarn
1 skein Cascade Pastaza in red
1 skein Opal sock yarn
1 hank Kaalund laceweight in Pointsettia
1 hank Blue Heron Beaded Rayon in Spanish Dancer
1 hank Ami Ami yarn
1 skein Noro Ganpi
1 skein FurrYarns sock yarn
1 skein Angora Valley sock yarn
1 skein Mountain Colors Mountain Goat
1 hank Schaefer Anne
1 skein Onlinie Supersocke
1 skein red beaded yarn
1 cone Classic Elite Venue
1 cone Silk City Bounce

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3 hanks Brown Sheep Handpaints in Sara's Dress
1 hank Mountain Colors Weavers Wool Quarters in Crazy Woman
1 hank ArtYarns Supermerino
1 skein Berroco Foliage
2 skeins Noro Shinano
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Gone:
4 skeins Filatura di Crosa 501
8 skeins Noro Lily
3 hanks Brooks Farm Fourplay
4 skeins Tahki Cotton Colori
1 hank Ami Ami 4 ply cotton
1 1/2 balls Gedifra Donatello
2 skeins KP Sock Landscapes
2 balls Filatura di Crosa 127 print
2 skeins Dale of Norway Sisik
16 skeins JoJoLand fingering weight yarn
7 skeins SWTC Beyond
6 skeins Schachenmayr Micro
6 skeins Cascade Rainbow
6 skeins Cascade Pima Melange
4 skeins Himalayan Recycled Wool/Silk
2 skeins black Micro Spun
2 skeins Handpaintedyarn.com laceweight
2 skeins Rowan DK Marl
1 skein Tess' Sock yarn
1 hank recycled silk
1 skein blue Malabrigo
1 1/2 skeins Filati mohair yarn
2 skeins Lion Brand Cotton Ease in "Pineapple"