While scrounging on Craig's List, I found a couple old Dewalt Radial
Arm saws. One is pretty pricey at $325 but one is $85 and the other
is only $70. Would it be worth it to purchase one of these or would I
be better off with a good miter saw? I already have a Jet table saw,
so my initial thoughts are that one of these would be redundant but
the prices keep bringing me back. From what I understand, the Dewalt
is one of the few radial arm saws that were really very good at
keeping true. Or am I wrong?

I don't know how much space would be eaten up by one of these but I
don't think it would be ultra-terrible, is it? I "share" my garage
with my car but even if I kept it outside all the time, I would need
to put this on wheels because there is simply no room. Also, I do not
know if things get all out of whack if I would move this thing all the
time.

Would it be worth it to go after one of these things or am I just
thinking stupidly?

DeWalt Radial Arm Saw Model 7740 - $325 http://pittsburgh.craigslist.org/tls/1620826647.html
Dewalt Radial Arm Saw - $85
http://pittsburgh.craigslist.org/tls/1665111701.html
RADIAL ARM SAW 10" DEWALT - $70 http://pittsburgh.craigslist.org/tls/1664498660.html

Thanks.