I can hear you on wanting it to go to a good home and not resold. Sadly a lof of great Amiga stuff gets that way. Ebay will net the most money usually though if you test and photograph it all well.
As far as someone getting it that deserves and will enjoy it, I think they best way is to talk to them on the phone before hand if you plan to let it go for a lower price than you see on ebay, just look at items sold and not listed.
I sold a few things and gave a lot away recently. Thats the way I did it. None of it made me much of a profit unless you count that going into other projects or money going to get things to fix other amiga systems for others.