Common · Consumable · Explosives
Same as in Classic Era.
There's no auction house to price until then.
About 1g 58s on Beta · Horde (1 day ago), from player scans. A vendor pays 16s 0c, so the auction house pays 9.4× 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 10 brings about 15g 1s there, against 1g 60s at a vendor.