I was told about this one a few days ago.
I'd suggest staying clear of it unless you're prepared to spend a lot of money. Not only does it not have brake bosses, it doesn't have cable stops as well.
To top it off, the headset is at a very steep angle. You can even see it in the pictures.
A quick measurement in Paintshop told me that the seat tube is at 71°, which is about right for an Sbike. however the headtube angle is closer to 80°, while it should be 72-ish degrees. Drop the forks to the normal height, and it becomes even more steep. This bike would be really unstable.
Also, the rust indicates that this is a CroMo frame, whereas all Sbike full suspension models were 6061 aluminium. I really doubt that this is genuine.
If this is indeed a prototype frame, it's one they didn't finish because they screwed up when they welded on the headset.
Maybe worth a bid because of the forks, but that's about it. If anyone buys it for that reason, I'm offering around £50 for the frame alone, to hang it on the wall.