Yeah... egads! That's expensive, for not having any proof it's real. To me, it looks like it's POSSIBLE that it's an A1000 prototype... But I don't think many people will lay down that type of cash without a little more evidence.
The shoddy pictures and fake tape/paper labels don't inspire confidence. The hand scribbled "Rev C" "silkscreen" on the mainboard doesn't look quite right, either. There are lots of things to pick on to argue that it's fake.
On the other hand, there are also some things that make you pause and think. The single shot of the 8 1-bit EPROMS showing V24.60 scribbled on old looking labels sure looks possible. A lot of the design looks like it could have evolved into the A1000. The cartridge slot on the front of the device is shown in some early A1000 concept sketches. Ditto with the joystick port placements.
Without access to the actual device, we just can't say one way or the other.