A thread-derailing post would be if you posted some trekking poles for sale and someone responded about, say, BSA's anti-gay policies, carbon-emission legislation, or went on at length about something else entirely.
People giving background on your history trying to sell such gear may not help you make the sale, but it is very much on-topic and potentially useful to a prospective buyer.
Ah, it now looks like our resident, anti-podal moderator has weighed in as agreeing the posts are relevant.
eBay is much more seller-centric than buyer-protective. Of course, almost no one on eBay will know or care why these poles cost 4 times Walmart's offerings. Oh, and they charge you listing and seller's fees.