It wasn;t always that way. Too many people had impulse control problems and abused the system in place. They would bump their Ninja Death Tool 4000 up to the top every 5 minutes and the Exchange looked like a giant pile of shit. At least now, people can list their stuff and have a decent shot at selling it, provided they have pictures, don't charge 7% fees, and know how to write a sales ad.
For the super lazy out there, the Exchange has a search forum all it's own. Once you get to the main subforum you want to search, type in what you want and every thread with that word pops up. It cannot be easier to find items than it is right now. You can also list your item in your signature space, that is something over 90% of people don't bother doing. For an example of what it looks like check out Craytab's signature space, that is how you do it.
What is not going to work is different rules for different exchange forums. Ain't nobody have time for that.