Just spent an hour listing books on eBay, now my bookshelf is looking a little empty but if I can sell some that means I can buy some more
I look on eBay as a recycling site, or lending library where you just usually have to pay for postage, and can sometimes sell stuff back on eBay for more than you paid in the first place. Whatever it means that less stuff gets thrown away. What doesn't sell goes to the charity shop where hopefully someone will buy it