World of Warcraft US
Challenge Warlord: Gold US
Fast, cheap, safe!
Completion time: 2 - 4 hours. Requirements for your character: 100 level and 630+ item level.
Challenge Master 8/8
Completion time: 3 - 7 days. Requirements for your character: 100 level + 630 item level on character
Endless mode (30 waves) US
Maximum term: 24 hours (most probably less). Requirements: Character level 100, ilvl 620+. Safe and sound. Guaranties
Challenger's War Yeti US
Guaranteed 660 ilvl epic (Daily CM quest)
Completion time: 1 day. Requirements for your character: 100 level and 630+ item level.