A trip back in time.

Good gravy; that's a major score -- a few of those are probably Seriously Collectible. [I'm trying to remember if the 1979 Door Into Fire is the Dell mass market or the Bluejay edition....]

If I were trolling a collection of that vintage, there are a slew of books I'd scoop up without a moment's hesitation even though I already own copies, just because they've never been reprinted (or at least not widely reprinted) and deserve wider notice than they got at the time. Herewith a short and by no means complete list; years given are dates of first publication, usually but not always in mass market editions. Given this particular audience, many of these titles may already be known to some -- or even most -- of you, but if not, they're all well worth tracking down and acquiring:

"Katherine Blake" (aka Dorothy J. Heydt)
The Interior Life (1990)

Mildred Downey (aka "Bubbles") Broxon
Too Long A Sacrifice (1981)

M. Lucie Chin
The Fairy of Ku-She (1988)

Linda Haldeman
The Lastborn of Elvinwood (1978)
Star of the Sea (1978)
Esbae: A Winter's Tale (1981)

Megan Lindholm (aka "Robin Hobb")
Wizard of the Pigeons (1986)

E. Hoffman Price
The Devil Wives of Li Fong (1979)
The Jade Enchantress (1982)

Just so it's clear, I'm not offering to buy up any copies of these that may be among the presently-described estate collection -- I merely point out that if any of the above titles are available therein, they're scarce enough and good enough that the copies offered are likely to be really, really good bargains for any even marginally interested reader.