Talk about a freakin' bargin! Your guildmate should seriously tip you for that, he can sell the actual glyph for a nice chunk of change right now.
I got extremely lucky picking up one of those books off the AH for 125g buyout (I feel sorry for the guy who put it up for sale, when they are up for like 3k now) and a guildie ended up with the HB glyph from it. I haven't had time to play around with it yet however.
Found 3 sellers on my server last night, lowest buyout was about 260, with bidding at 160. I put in a bid, hope no one overbids me. ;) Either way, I'll pick it up later today in prep for tonight's raid. Should smooth out my aoe rotation nicely.
Waiting to pick mine up, there were only two on the AH for 550g/each, I refuse to pay it, so I'm sitting and waiting until a guildie gets it or the price drops.