It's been a while but I managed to get a 6040S. Unfortunately it was shipped from Lithuania to California, USA in nothing but 2 layers of bubble wrap and a trash bag. It sustained quite a bit of damage. Cards bouncing around, cracked boards, damaged connectors and pins, case broken. I got a refund and it seems like seller doesn't want to pay to get it back. I've decided to do a cursory look to see if it's worth my time doing anything with it other than recycling.
First issue, minor, is that it is incompatible with the US grid with it being exclusively 220V 50hz. Major issue is lack of schematics. The damage it sustained really isn't small and I don't know where some of these broken connections went. So if anybody has schematics or other technical data it'd be really helpful.
The front panel is mostly intact which is the only reason I'm considering it. It doesn't have a gpib board but I could use it without(even if I need to make something to keep it from failing due to gpib) as a standard lab meter.