If you have 20 or more pieces, check with Dennis Kroh at Empire Arms.
He buys collections of milsurps and will travel to do it, if large enough.
I have bought from him a few times and found him easy to deal with.
Understand that your maximum income would be from selling them yourself, at the expense of some time and effort.
Getting them unloaded quickly and/or all at once means another party will have to buy them at less than full value so they can also make a profit on the sale of them.
If it were me, I'd put one or two up for sale myself and see how it went before taking the 20-40% reduction for a quick bulk sale. Good guns sell themselves.
I'm new here but I my experience is that the people here or on any established gun/collector forum are more than happy to help people like yourself with info and resources.
Scrutinize closely all of the private messages you are likely already receiving from individuals. Most will deal fairly with you, while a few would gladly use your lack of knowledge and experience to their own benefit.
The prices that gnarlytoes posted all look good. Conditions and rare features can vary wildly, causing the broad spread on some values.
Condolences for your loss.
Jay