Cat Carrier (Siamese)

About 27s 0c on Beta · Horde (5 hours ago), 35s 0c on Beta · Horde (23 hours ago), and 20s 0c on Beta · Alliance (24 hours ago), from player scans. A vendor pays 15s 0c, so the auction house pays 1.7× more.

No. It is in Classic Era too, with the same item level, vendor price and stack size.

Sell it on the auction house. After the 5% cut a stack of 1 brings about 25s 65c there, against 15s 0c at a vendor.