Read from the World of Warcraft client build files.
How Flame Trader's Gloves Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Flame Trader's Gloves suits Assassination, Outlaw and Subtlety Rogue; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter.
Similar Items
The 2 items nearest to Flame Trader's Gloves (item level 437) in item level among Armor > Leather, Hands slot, from item level 330 to 545.
+1010 Agility or Intellect, +1515 Stamina. World Drop
21 goldon 48 realms
Underscout's Gloves has the highest item level here (545). The lowest listed price among them is Underscout's Gloves at 21 gold in the US Auction House.
Blizzard numbers items as they are created, so the named items next to ID 221209 (221204 to 221214) were usually added in the same batch as Flame Trader's Gloves: the same quest line, zone, vendor or reward set.