Does it look like this:
If it does then it is an Intense Slopestyle, otherwise it’s an Intense 6.6.
You can find out about Intense frames here including the SS2: http://www.intensemountainbikes.com/cms/
The Slopestyle frame does not often come up for sale but 900 sounds allot. What shock does it have?
BTW, if it’s the above then it will be bloody brilliant! I’ve put a reverb on mine now and just use it for trail riding and it’s still bloody brilliant. Over kill, yes, but I don’t care!