We're a 25 man guild that can't get more than 18 or so people on anymore due to end of expansion shenanigans, and I'm considering GDKP as a remedy to this, or something close to it. We were 11/12 heroic before everyone stopped logging in, I'm thinking we could probably do a full clear with a handful of buyers/pugs/whatever. My main question is, should I stick with the traditional GDKP format where its Pot/25, do Pot/(guild people), or just flat out sell 277 loot to a handful of people and bank it for the guild?

If you ask me, flat out selling 277 loot won't work very well because people will feel it's not worth the investment this close to 4.0 What you can sell, on the other hand, is the wyrm. Most people will be delighted to pay a fortune for that 310% mount, so that would be your best bet.

As for the other options you suggested, I wouldn't really consider trying them. GDKP always feels clunky in a guild raid, mostly because people are never too happy at the idea of paying for something they were entitled to for free; so unless you entire roster is 100% OK with the concept, I wouldn't try it. If they do agree, however, then I'd advise going for classical GDKP format: Pot/25. You'll attract more people that way, and you'll make more money because they'll be willing to shell out way more cash (since they know they'll be making a few thousand gold at the end of the instance).

Unfortunately, that only worked up until patch 4.0. Now they've taken out epic flying from all achievements, except for Long Trip.

310 gone in 4.0:
MMO-Champion BlueTracker | Violet drake down to 280%?
This isn't the exact thread I wanted, but it explains it good enough. Unless you obtained a mount prior to 4.0 that could go 310% then all mounts are now 280%, unless you purchase the skill.

Long Trip:
World of Warcraft - English (NA) Forums -> What A Long, Strange Trip It's Been

Something else that is worth pointing out for GDKP right now: T.10 251 armor can be obtained though chain-heroic instancing, since you can now buy it with the very same Justice Points that each heroic instance boss loots.

The thing is that alot of people used GDKP to gear up alts. Now, you can get an alt full T10 251 in under a week by going all-out on heroics (80-100 points per instance, 600 to 1000 points per piece of gear). So that's one major incentive down as far as GDKP raids go. Maybe you might still get people to pay some decent coin for trinkets/weapons/shields & OH stuff, but that drastically reduces your income.

I guess it's also worth noting that Gold Raid Manager is currently not working with the patch release.

Do people have a fix to make it work? or are you using other addons?

I tried using GDKPd this weekend and there's some things I liked MUCH better, but overall I didn't like it and I don't want to keep using it. Though it would only take a couple of fixes to make me like it (and some may be in there and I just don't know enough about it).

pros:
It provides a visual indicator for each person who still owes you money. That's just awesome.
It provides option to announce loot and start auto-bidding. I like that.

cons:
No option I could find to pause bidding
No option to rebid if someone accidentally types in 750000
No option to generate a report listing all bosses and sale prices per item / total per boss
Although you can set to hide in combat, I couldn't find an option to minimize and reopen. That was a pain.
No option to provide countdown at higher frequency than 5 seconds
No option to allow manual start of bidding on each item. (ties in with no pause).


Bottom line, I liked GRM better because it was a little more flexible and I felt I had more control. But GRM's not working.