Wow! I was just playing WoW on my Alliance destro warlock, & saw that someone in trade was selling the "Sealed Tome of the Lost Legion" for 4,000 gold. My warlock is a long way off from 90 and doing the green fire questline (and I know it's not super tough to farm, just time consuming), but I was curious how reasonable a price that was, so I asked folks in my guild (CTR Nalak on Aerie Peak US) chat what they thought of the price. I got some varied opinions, and a minute later, someone else in the guild whispered me & asked if I'd bought the Tome yet. When I said no, he/she said that they had bought one for me off the AH for 3K gold! I tried to get them to take compensation for at least part of the cost (I've got a lot of gold on both my warlock and my pally main), but they refused, saying it was on them!
With everything you hear about how a lot of folks who play WoW can be rude & thoughtless, this is an awesome example of how very, very cool & helpful people can be, and why I'm very glad to have joined the CTR guild community!