What should I do with 18 issues of Omni magazine, 1978-1989?

I have 18 issues of this ground-breaking (and regrettably extinct) magazine of science and science fiction scattered over the period from 1978 to 1989, including Volume 1, Number 1, of October 1978.

I don’t feel like spending the time and effort to educate myself to the marketplace and find the absolute best outlet for sale or auction to collectors. I’d really just like to get a fair and decent price for the lot or else for any individual issues that might be rare.

What’s the best way to go about finding one or more buyers at a reasonable price?