My dd1 buys virtually everything 2nd had - her own clothes, furniture, etc. Charity shops, Gumtree, FreeCycle, etc. She finds some fantastic bargains - really good quality stuff.
Virtually all her children’s clothes are hand me downs from friends, and she passes theirs on likewise. Recently passed on a lot of Gds’s clothes and toys, inc. a bike, to a little Ukrainian boy who’s moved in down the road.
Having said that, she did get a bit annoyed with me recently, when I wanted to buy a specific new item for a Gdd’s birthday - one she’d specifically asked for.
Sorry, dd, but for a birthday, 2nd hand just isn’t quite the same as a brand new one in a box with all the bits.