Pft, I gave away three A4000's years ago (though I got an apple pie for the third one). Mind you, they where stock (and I got them for free as well, no use for them). Saying that, in this market $400 for that A4000 is a steal imho
I would have prefered to have just traded both my 3000 and 4000 for a fully stocked 1200 in order to cut down on the clutter in my room, but the one serious offer I got backed off at the end for sentimental reasons that I fully agree with since a pimped out 1200 is not something you want to just give away.