4 Sharp Corners, established in 2003 by Stan House and Roger Rumsey, is the world's largest seller of PSA-graded sports cards. With over 3. 5 million cards submitted to PSA, we have the largest variety and inventory of graded sports cards available anywhere.

From pre-war to modern, we cater to all collectors, offering baseball player sets, Star Wars, Pokemon, and more. As lifelong collectors ourselves, we understand the diversity of the collecting community and the excitement of finding elusive pieces for your collection. Our primary grading service is PSA, the most widely used and accepted professional authentication and grading service.

By using PSA, we ensure that our cards are not only authentic but also add value to our inventory and to the collectors who purchase from us. Whether you're a seasoned collector or new to buying graded cards, 4 Sharp Corners is here to deliver exceptional cards and service to fellow collectors