I don’t use the BRs as either a Seller or Buyer…
But I think (from what I see posted in the Forum) one thing that would really enhance the UX for both sides is if there was a way to actually “teach” both Sellers and Buyers how to use the system.
I also think that there should be two tiers of BRs.
One for Entry Level-type jobs.
These would be the projects that are (for the lack of another term) low-budget, anyone-can-make-an-offer-on jobs.
Then a second tier would offer more um, professional-oriented projects with higher budgets.
I think that would get around the need for a lot of filtering as long as Sellers and Buyers pay attention to where they post jobs/offers.
Just my two cents.