Are you sure you want to publish your collected works all at once? Given your proficiency as Robert Morpheal, I'd expect that book to run to more than 1,000 pages. I think you'd be better off, if you want your collected works in print, to print them in a multi-volume edition.
A very good way to do that is to publish them on Amazon Kindle Direct Publishers - not only will they publish your book in both print and Kindle form, but they'll list them on Amazon.com. All it will cost you is the price of a couple of preview or author's copies - less than $20 - per volume.
Even if they don't sell to the public, you can buy your own copies at the low 'author copy' rate - $5 each or so - to give to your family, send to reviewers, etc. In addition, having your works in print gives you a stronger proof of copyright, if needed. It will lower the price magazines will pay you to print your works, but I don't think any of us here expect to get rich on *that*.
I helped Will Dockery do that last year. We're both happy with the result:
https://www.amazon.ca/Selected-Poems-1976-2019-Will-Dockery/dp/0994860013