I do try to sell the items that have enough monetary value. It does ad up. I brought in $500.00 this last week selling some rugs I have had sitting in my friends garage since I sold my last house nearly 10 years ago. I would have a yard sale if I was in a better location for one because you can move lots of stuff even if it is priced lower than might seem worth bothering with.
Timing can be important too though. For instance I have some heaters to sell but I will wait on that until a few weeks before I leave this fall. If I wanted to sell the small portable AC and some fans, this week would be prime time for it. But I still need them so I will miss out on prime time.