In that condition--with the nose gone--a Carinus would not be worth $20, much less $460. Good for you for noticing it was a Carausius, not Carinus. Even so, better examples of Carausius can be found for 1/10 the ridiculous "$460" listed price.
Tis he lesson not to pay too much attention to identifications and proposed prices. Sometimes they have little relation to reality.