biglouis
I get the impression customers on Vinted dont want to pay very much. If they are just clothes you are getting rid of fine to make a few pounds. However if they are couture brands or genuine vintage I would not sell them there.
I think you just have to be strict with the prices. I ignore all emails asking me to drop the price. Particularly if I get more than one, then I know if I wait, I'll get the listed price (happened yesterday, 3 asking for a price drop. Not happening). But you have to be prepared to wait. I just list the items at the prices I want and put them in a box until one sells.
Another reason I like Vinted is that I can list items and just leave them on there. No relisting etc.
I research the items I'm selling before to make sure my price is similar to those elsewhere and then don't budge. I'm selling off my DD's genuine vintage, expensive clothes. Prices for me are non negotiable.
I also sell off stuff that otherwise would go to the charity shop. I save good packaging from stuff the family buy online and recycle it so no packaging costs, other than tape.
I understand about the courier issue BlueBelle. It just so happens for me the corner shop near us offers a courier service so it's easier than going to a post office which is further away.