Allegro Open Road

Is there a big difference between the 2007 and 2006 model Open Road? I
have a chance to buy a 2006 35' tsa workhorse three slide outs with
4000 miles... All the upgrades for about 80 grand or OBO... Is this a
good deal? I noticed the 2006 model does not have a basement. Do you
think this is a deal breaker. Thanks for your pending advice...