The problem with 2nd hand is convenience. Maybe I can save a few bucks browsing eBay etc. but itβs not worth the time spent compared to ordering new. I hate doing it though.
If you just happen to need a potty now, then browsing is a lot of work.
If you know "oh, we will need larger cloths and a potty and some toys soon and that bed will be to small in a bit" you can monitor relevant sites on the side and see when the opportunity comes up.
Not to mention the social circle with parents a bit older and a bit younger. "Hey, we don't need this anymore. Do you?" - "oh it's a bit early, but I take it already thanks!"