@ScottishMouse - I think mine might not be selling due to my indolence at not bumping. Also it's priced higher than the cotton bandanas so not a really really cheap item - though fairly priced I think . Ive bumped it and reduced slightly to hurry it along for you.
I do the same as you - buy it now and open to offers, and I always check previous sold prices to see what's fair - I've never used vinted to sell (always use Ebay and the FB group
I'm sometimes puzzled about why things sell or don't sell. I often think something like a jumpsuit, for example, can be hard to picture unless you can see an actual pic of someone wearing it? Hope you manage to sell your things!