Jeff V. collects and trades in just about any kind of baseball trading card he can find, but he's a specialist in Roger Clemens and his collection of BGS-graded and -registered Roger Clemens is just — well, massive is the only word I can think of to describe it.
Jeff's a nationally-known Roger Clemens expert at the beckett.com website, and has a fantastic eBay positive feedback record. You can trust him to help you find the card you need (heck, he probably already has it) and to deal with you fairly, ship quickly and with care, and make sure you're happy with your purchase.