Donating a lifetime collection on the condition that it will all be kept
together seems rather unlikely to me. Not impossible, but there are very,
very few old-radio museums in the world, and most already have more "stuff"
than they can ever exhibit.

Have you tried contacting nearby radio collector clubs? You may meet someone
who would appreciate what you've got. One club list is available at
http://www.antiqueradio.com/clublist.html (no connection to me).

If you can't find anyone to take the whole shebang, and you aren't
interested in eBaying on your own, perhaps you could find a local broker to
sell everything on eBay for a commission. Selling piece-by-piece will get
you much more than trying to sell an entire collection in one lot.

I have already resigned myself to the idea that if I kick tomorrow, my
"treasures" will probably be hauled away by the nearest charity truck. If
you donate to a pick-up charity, at least you could take a modest tax
writeoff.

Regards,

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html