Way to farm alot of money for locks

I guess everyone in wow knows about that lock can get green fire spells. But not everyone knows how to get it and/or where to get the item for it. People on my realm are buying this for ALOT (highest on underminejournal i saw was 65k)

The item i'm talking about is : Sealed tome of the Lost Legion

The Locations of the rares that drop it are:

• Haywire Sunreaver Construct - various, see - 49,90, 50,92 & 57,85. Will patrol around the beach.
• Mumta - 35,63
• Ku'lai the Skyclaw - 38,83
• Progenitus - 51,71
• Goda - 54,53
• God-Hulk Ramuk - 62,50
• Al'tabim the All-Seeing - 45,30
• Backbreaker Uru - various, around 48,25. Will patrol around the entrance to Lightening Vein Mine
• Lu-Ban - 54,36
• Molthor - 59,36

It can take a long time before the item drops but if it sells for +-60-65k on your realm it is worth the time.

hope i helped some people