So I've been searching for various singles online. I mainly play for fun and a little competition here and there so honestly as long as the card doesn't look like it's been through a washing machine,I don't mind a used cards(lightly or moderately played for more technical terms.)

With that being said I've been seeing a lot of cards that are cheaper on ebay than the ones on tcgplayer. If both the cards come from a verified/high rated seller then why is one site more expensive than the other?

Also ebay works with split payment apps like Klarna,Zip, etc. While tcgplayer doesn't unless you have a PayPal account. So with cheaper cards and more payment option ebay seems like the better choice, yet most people sing the praises of tcgplayer and condemn eBay. Why is this?