Thin Kodo Leather

About 1s 20c on Beta · Horde (11 hours ago) and 19s 73c on Beta · Alliance (13 hours ago), from player scans. A vendor pays 25c, so the auction house pays 4.6× more.

1 recipe: Kodo Hide Bag.

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 10 brings about 11s 40c there, against 2s 50c at a vendor.