Well that's one reason why I said I'm not sure how many of/how much these items can be reused. For something like a wooden table/chair, and a TV/monitor/etc., s

Well that's one reason why I said I'm not sure how many of/how much these items can be reused. For something like a wooden table/chair, and a TV/monitor/etc., sure, it might get reuse. But for a sofa or mattress? I don't know about you, but unlike with a desk or chair, I wouldn't just buy any random 2-year-old sofa or mattress a stranger throws out... whereas I'd keep using the ones I've had for the past couple years in a heartbeat. The other reason is, if everyone just "updates" stuff for no other reason than "because they want to", then that's obviously going to tend to cycle through products more rapidly than if people didn't just "update" on a whim, even if the second-hand-ness wasn't an issue.