It just dawned on me a option that may suit everyone, but maybe a software limitation. This is a feature on pinside that is great for filtering the way they list all their threads. Yes I know something from another site but just an idea that could lead to something.
Have the same site layout but on one of the sides have an option list as per attached file but with the categories to suit AP. So if the guys only interested in the for sale section and the restoration section only - only the threads for those areas appear. This could be even be a profile setting so when you log on that is all that appears.
just a idea, don't shoot me