You need to use 'bulk edit' while in seller hub.
I can see you are a fairly new seller, but you do need to have a business account if you are trading - buying items to sell.
https://www.ebay.co.uk/help/eua?id=5275&mkevt=1&mkpid
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)
