I'm vending, questing and searching. I think I've set myself something that's realistically done over a year or more so, and I want it done as soon as possible. :P
Items from the list below under 10,000 I've searched and is in my wardrobe.
All marauder stuff
Bathing suits
Buttoned Cuffs
Clips on collars
Cozy Socks
Fingerless Gloves
Glasses
Jumper Dresses
Most Basic flats
Mini nail Polish
Pastel Miniskirts
Puffy Hats
Shawl Cardigans
Square Scarfs
Striped Toe Socks
Witches Hats
Zebra Knee Highs
Collections I've only completed: Bad to the Bone Braids Pair of angel Wings
Are there another things I could search for or Subeta suggest to quicken my set quest?
As of 20th October I only have 3,339/15,000 items.

Have you been using SubetaLodge? You can make a list of wardrobe items, and just check off the things you've bought! You can also sort everything by price, so you can easily grab up all the super-cheap items and knock out a few tiers at a time (:
I've been using it (went from 4k to 10k in about 4 months) and it's a total lifesaver for collections!
