It really annoys me when I favourite an item on Vinted and the seller immediately messages me offering a discount or saying they can 'post tomorrow' etc. It gives off a desperate vibe. It the same when sales people in shops follow you around asking if you need help, when all you want to do is browse. I feel harassed and uncomfortable, which leads to me leaving said shop.
I instantly unfavourite the item on Vinted when I receive a begging message.
Thats it really!