Representative advised me today to try and get a 2021 desktop from a retail, as i want to purchase it outright; does Costco sell additional quickbook users?

Contact us in private and we may help to provide the one time (outright) license for QBD 2021.

Hi LHDB. Thanks for connecting with us here. I'd like to help make sure you get the help you need so you can get back to doing what you love. 

In order to learn more about the product cost, you'll have to contact our Sales Team for more info on discounts. You can contact our Sales Team by dialing: 1 888-829-8589. The hours of operation are Mon - Fri 9:00 - 18:30 and Sat - Sun from 10:00 - 16:00 EST. You're more than welcome to keep me posted on how you make out. I'll be on standby