Welcome to Amiga.org. I am sorry about your loss :-(
To help with estimation of value, location and a general idea of what you have would help. Some Amiga hardware has the pontential for good resale value, even in 2007. I'm sure there are plenty of people willing to buy the whole lot and maybe that is what you'd prefer. However, if you want to get the most money possible selling many items indiviudally would be the way to go.