PWCC has
Vault (free tax)
international shipping
easy to sell if your card in vault
cash advances
payment plan
they sell more than cards, although i only buy from them twice, but i do see if i'm not in US, probably will buy more from them
And here's an example, pwcc vs non pwcc on 54 aaron psa 7, that pwcc one is nicer one. price about the same
https://www.ebay.com/itm/1954-Topps-...p2047675.l2557
https://www.ebay.com/itm/1954-Topps-...p2047675.l2557