I got extremely lucky and managed to pick up this beauty for the incredible price of a couple of beers:
(My first AGA machine <3)
I've not been able to do much with it (waiting for the 3.5" PATA to CF adapter to arrive in the mail tomorrow-ish), but I'm in love.
Appears to have a standard C= 040 card, 2MB chip and 16MB fast (although I think more RAM is plugged in, as all slots are filled and 2 modules are marked "8MB").
There's an old X-surf card in there (no idea which model, it's from 1999 though), and some videocard that seems to not really do much more than provide S-video and composite (alongside standard amiga RGB).
Also included with it were a crate full of floppies (must be hundreds of 'em), a ton of old Amiga magazines, CD-ROMs, bunch of assorted cables, an "Emulator 2000" PC emulator card (8088) and this interesting contraption:
I'm pretty sure this is supposed to work as an external HD-FDD for the A4000 (that's what the cable is for anyway), but so far all it does is show up as DF2:????, even if no disk is inserted, so who knows if it works or not.
I hope to be able to upgrade it in various ways over time. Especially a 060 would be nice, but considering the prices they usually go for, I doubt I'll ever own one in my lifetime.
EDIT: here's a shot of the bin with floppies as well: