I'm not sure a "one size fits all" For Sale section is going to work. I prefer splitting private and dealer announcements like MPF.
If a collector is trying to sell a couple of posters - which may take a long to sell - that announcement may get buried under weekly (or more) auction announcements from dealers. Nothing against Bruce's announcements - I look forward to his tri-weekly
"PRICES ARE INSANELY LOW, THE SKY IS FALLING, HELL IS FREEZING OVER, AND YOU ARE MISSING OUT ON THE DEAL OF A LIFETIME" announcements.