$20 each is
fair. A little less ($10-$15) if they are in
I recently sold one in good condition
for about $50 or $60
Most places will want $13 as a disposal fee, outside of this list there are
what, maybe 4 people who have a use for one and don't already have 3 spares?
Value depends a lot on where you live in the food chain (scrap industry),
and if you actually have some use for one.
To me, about $10 to $20 in a garage (take the whole batch) sounds fair, and
so is $50 for the nice ones if you are willing to test it, clean it up, and
then box and ship them one at a time.