If yiou haven't already done so, read the pirate Scam.
Ok now....
lev 60's in raiding guilds usually have the moolah so why not target them with a similar mail and present on COD
Have the text go something like this
Ahoy {targets name}, I be seein' that ye and Ye shipmates be havin' found me booty map in one of them dungeons you raided
Be ye supprised when ye came t' come across thar be nothin' at th` wreck site? Figures...
I felt bad so me an' th` rest o` me buccanneer buddies be havin' decided t' send ye a Purple present. Oh come on now, nothin' in Azeroth be free! Bah! I be willin to part with it for the mere price of 10 gold. What do ye say?
Cuerzo, th` One eye`d buccanneer
The trick here is that we are making it look like something one of their raid team picked on a raid up and they are getting an epic item for 10g.
We are also not using an actual name of an ingame NPC so we can't be accused of impersonation - it is just a good honest to goodness cod scam.