>Only in the same sense as selling organs or babies (or conspiring to fix prices) is a victimless crime.

Selling your own organs is definitely a victimless crime. Arguably the baby you are selling is the victim of a baby-selling scheme. The victim of a price-fixing conspiracy is the consumer (though every member of the conspiracy has an incentive to defect and sell at a lower price, so presumably the individual members of the conspiracy are also in some ways victims of the scheme, to the extent that the scheme is actually enforced upon them somehow).