We need to delete older "for sale" posts and dealer's listings. I suggest 90 days. These listings have rendered the search function useless. For example, I tried searching older threads about linen-backing and ended up with dozens of "for sale" posts.
You didn't use the advanced search function.
I'm not a believer in deleting threads.
I am fully against it. Each thread is part of history, and sometimes you might just find a poster you've been looking for thanks to an older thread; it's happened to me with regards to some great posters.
What is needed is separate sections for eBay auctions, private sales/trades, and dealer sales/trades.
This would differentiate between the three and make searching in the For Sale section easier.