I also have an XL 2010 AquaLung ProQD BCD available. I bought it because I was living on a cruise ship and didn't have my CressiSub with me. 
This one also no longer fits (Lost too much weight). I've only used it twice, and paid $550 for it. I'd like to get $300 OBO for it.
Details from Aqualung.com:
The popular Pro QD BC, long considered the mainstay of the industry, is getting a new look and updated with all the latest features including the patented SureLock™ II weight system.
This latest revision now represents the best collection of features on the market for a mid-range BC. Not only does it provide value but it also offers unsurpassed comfort and durability.
The SureLock™ II(patented) weight pockets align themselves and lock into place without even looking. Just insert the pocket until it “clicks”. A simple, single-pull release is all that is needed to jettison the weights in an emergency
The new, proprietary backpack has a built in traction pad to reduce tank slippage as well as a built in carrying handle
A lower gusset along the bottom perimeter provides additional lift without adding bulk under the arms
A series of internal ligaments gives shape to a fully inflated air cell thus preventing squeeze
Two large lobe pockets are secured with heavy-duty zippers
Features 6 stainless steel D-rings to attach accessories
Includes attachment grommets for knife
Has a pass-thru grommet for a retractor
Now has an adjustable waistband – new!
Depth compensation on waistband - compresses at depth along with your wetsuit
Lobe retaining D-rings allow you to hold lobe stationary with opposite hand while weight pockets are inserted
Large pull bobs on dump valves are easy to locate and grip with thick gloves
Octo-pocket inside the right lobe prevents dangling octopuses
Positioning strap allows you to set the Pro QD at the perfect height each time
The exterior is fade resistant and abrasion resistant
This one also no longer fits (Lost too much weight). I've only used it twice, and paid $550 for it. I'd like to get $300 OBO for it.Details from Aqualung.com:
The popular Pro QD BC, long considered the mainstay of the industry, is getting a new look and updated with all the latest features including the patented SureLock™ II weight system.
This latest revision now represents the best collection of features on the market for a mid-range BC. Not only does it provide value but it also offers unsurpassed comfort and durability.
The SureLock™ II(patented) weight pockets align themselves and lock into place without even looking. Just insert the pocket until it “clicks”. A simple, single-pull release is all that is needed to jettison the weights in an emergency
The new, proprietary backpack has a built in traction pad to reduce tank slippage as well as a built in carrying handle
A lower gusset along the bottom perimeter provides additional lift without adding bulk under the arms
A series of internal ligaments gives shape to a fully inflated air cell thus preventing squeeze
Two large lobe pockets are secured with heavy-duty zippers
Features 6 stainless steel D-rings to attach accessories
Includes attachment grommets for knife
Has a pass-thru grommet for a retractor
Now has an adjustable waistband – new!
Depth compensation on waistband - compresses at depth along with your wetsuit
Lobe retaining D-rings allow you to hold lobe stationary with opposite hand while weight pockets are inserted
Large pull bobs on dump valves are easy to locate and grip with thick gloves
Octo-pocket inside the right lobe prevents dangling octopuses
Positioning strap allows you to set the Pro QD at the perfect height each time
The exterior is fade resistant and abrasion resistant
