I'd still expect to pay a little less for a used one, personally. Used Items depreciate, even kickass heirloom quality humidors.
For what it's worth I just ordered an Aristocrat Commercial 4272 for under $2500 shipped. Was quoted 6-8 weeks turnaround time. It has sliding glass doors up top instead of cabinet doors but it saved a lot of money that way. The 4272 is 42" wide by 72" tall.