Zara kids clothes seem to sell well.
I buy alot of my toddlers clothes from Vinted, mostly Zara, if it’s in very good condition (not faded or stained!) it usually sells quickly. I won’t pay anymore then £3.00 though.
Another tip that might be helpful to anyone new using Vinted - before you buy something from someone, check when they were last active on vinted.
I made the mistake early on of buying something from someone who didn’t send the item or reply to messages etc - when I checked their feedback, it had about 4 recent automatic 1 star reviews saying the sale was cancelled. Their overall rating was still high so I didn’t check individual feedback. When I looked at the last time they were active on Vinted, it said 3 months ago!