Right now you can only do each card individually.
Part of the new Beckett.com site is going to be a 'matchmaker' feature that will do what you are describing, but there is no word on when that feature will be ready to be released.
Part of the new Beckett.com site is going to be a 'matchmaker' feature that will do what you are describing, but there is no word on when that feature will be ready to be released.