The Nausicaa one on the top I remember seeing on Yahoo Japan several months ago.  I remember
the last bid being around 230,000 yen.  Not sure if that was the final bid though, seemed
low to me (b/g was not matching).  There was a catbus that was recently on Yahoo that went
for 350,000 yen; which is more the price I'd expect to see for that Nausicaa.  The two cels
seemed to be comprable quality (though I'm biased towards Nausicaa and am not much of a
totorro fan).

The Akira one I remember seeing somewhere else a 
few years ago. Might have been one from same sequence, not necesarily that one.  Went for 
about $400 at the time.  Since haven't seen many nice Akira cels so it makes it a bit hard to 
make a good comparison between then and now.