There is a premium associated with a PCGS label. That said, they charge roughly $65 to attribute an error coin. So it really had better be a super fine error coin before PCGS enters into the equation. ANACS does a fabulous job with such for a lot less money, so there is that. So if you've got an MS-66 1966 DDO-001 on a ragged clip, go for PCGS. Mostly, though, ANACS will be your best option for such coins.