Check the top of the front panel on this video.
https://youtu.be/xFbKD1qx8Jc
Those bits at the top are removable and often get lost.
The metal frame and inside are clearly a BeBox, the blue plastic drive space covers on the front looks a bit weird but it may be due to lighting or abrasive friction against something.
The price looks high but if you scroll back up the thread people have been selling them for similar prices lately.
It looks ok to me, I think it’s just the lighting, the plastic used does this kind of effects indeed.
Looks legit to me as well. Older BeBoxes use a darker plastic for the front panel.
For the asked price, I hope it works! Price-wise, we’re into “NeXT Cube with Dimension board” territory here, and it could be a 66 MHz PPC 603 (no ‘e’) BeBox.