Michelle, this really is a sad situation and I extend my sympathy to you and anyone else affected by Fred's death.
Lots of good advice here, and I think a reliable dealer is the best route, but in case that's not an option, here's another idea though it might take the collective community to assist. Why not develop a list of the gear here and have the group discuss its value, hopefully trying to give you some idea of what it might sell for on A'gon.
Then, if folks here are interested in actually buying, we can collectively vouch for each other or maybe the price and ensure you at least are not being gouged by the unscrupulous. Not sure this is workable or if you even have the interest in going this route, but I'd like to imagine that the A'gon community can be respectful, helpful and community-minded. I know if I passed without provision for this, my wife would also be at a loss as to how to proceed and I'd like to think my gear went to good use at a price that was fair for my family.
Regardless, we're really a small community, and it saddens me when any long-term member leaves us. Peace to you.
Patrick