One source of the specs on that model:
Fleetwood 2008 Jamboree 26JThe floorplan is a corner bed model and no couch.

The price is great though and a good model to hit the road to see if you love RVing.
Some here would not buy a corner bed, or just a cabover like we have, but we are still agile enough to get into the cabover and don't mind the slight disturbance from night bathroom visits. We like the short length. This one is 27' actual length, which is a bit long for a corner bed model--some are only 25'.
We drove ours for a year before we replaced the tires it came with, two new and four older tires. You take a chance with older tires but if you are just camping locally, it may be worth the time to see what else is wrong with it.