THE DMCA AS ANTITRUST VIOLATION? Using it to keep people from sharing sale prices seems like one to me. I hope that some state attorneys general investigate this.

UPDATE: Reader Howard Marvel says that there shouldn’t be an antitrust issue here unless there’s collusion involved. I don’t know, of course, but complaints from multiple people, with the same legal theory, addressed to the same fairly obscure website, suggest to me that there probably is. But that’s why I posed it as a question, not a conclusion, and suggested investigation.