Hey Hero,
The challenge with selling HMLK10 is that it is a time investment and certainly not something we can promise to give to you on a single pull or even possibly within 10 pulls. It's a difficult fight that requires very precise execution. The secondary problem is that, as far as I am concerned, it is a 2 heal fight where generally you have a H Paladin / Disc or a R Druid / Disc combo. Using you as the H Paladin assumes more risk due to healing wipes, since we cannot guarantee that healing will be consistently stable. We will have to deal with you learning the fight. Even as you know the abilities and gist of the strategy, there is something lost when you haven't experienced P2 / P3 consistently with a group of raiders.
I am not against selling this title to you for the right price. The guild Exodus on Ysondre, one of the top-ranked US guilds in the world sells this achievement for 50,000g. I believe this is a fair market-value price for an achievement that is really not the easiest to get, even at 30% and with our main raiders in near full 277/284 gear.
The simple nature of this post is that this will possibly be accompanied by some wipes as you learn the fight, and even possibly some due to our raiders. We're not perfect and this fight frowns on imperfection.
Before we even talk about getting a roster and time set, I need a guarantee that 50,000g is both acceptable to you and you can pony up the cash.
Cheers,
-Senke