I had no clue what NWT, EUC, NIB, and many other terms meant. As a buyer, this frustrated me, and as a seller, it caused me to use the space in my title for these words instead of the well searched abbreviations. Here is a list of common abbreviations used in listings for clothing items and other items such as books:

• NWT New with Tags
• NWOT New Without Tags
• EUC Excellent Used Condition
• VGC Very Good Condition
• NIB New in Box 
• NIP New in Package
• OOAK One of A Kind
• BIN Buy It Now
• NR No Reserve
• N/R No Reserve
• TCP The Children's Place
• EMB Embroidered
• HB Hardback book
• PB Paperback book
• SB Softback book
• COA Certificate of Authenticity
• OEM Original Equipment Manufacturer (not aftermarket)
• NOS New Old Stock
• OOP Out of Print
• PP Paypal
• MO Money Order
• CC Credit Card
• BOHO Bohemian Hippie Style
• ORP Original Retail Price
• ON Old Navy