How do you make sure the iMac you are ordering is the same year? I am guessing 2021 is all they still have.
Are there 27" 2021 versions out there?
I purchased my 27" last year and I got a 2019 version.
Will take any and all advice.
The model year of iMac is when it was announced, not when manufactured.
All iMac models are listed on this page, with links to specific tech spec pages for each model:
Use this information to find out which iMac you have, and where it fits in the history of iMac.
support.apple.com
Additionally, if you are on the Apple website, within the Mac section, you can click on 'Compare all Mac models'. The drop-down will identify the current and most recent model of each desktop and laptop Mac model, and the year associated with most
but not all models is given in parenthesis (they probably don't give the year for the current 27" iMac because it is still the 2020 model and they don't particularly want that emphasized):
See what makes each Mac laptop and desktop different. And find the one that’s perfect for your life, your work, and your budget.
www.apple.com