Why so many B & W Speakers on the used market?

I live outside of the Denver area, so my Facebook Marketplace (among other sites) draws from the Colorado front range cities. So why do I see so many B&W loudspeakers being up for resale? Is it just that Listen Up has been a dealer for decades and the market has sold so many previously? Or is there an inherent problem that wears thin on the listener that they seek something better? I mainly see the 700 series, in different sizes and series, but CM9's etc. I'm just curious b/c I plan on moving to a new house in the next year and want to have a dedicated listening room, hopefully under $10K for the source, amp & speakers. I already have a nice analog set up to incorporate into it.