 I got a really great deal on a left over 2003 M45 demo with 1200 miles.  The dealer advertised $10,000 off MSRP and that's what I paid.  $35K for a rwd V-8 is a great deal.  But with the deal has come some real reliability issues including new tires (Michelin Pilots) due to lot rot, new battery and a new fuel pump (all replaced under warranty). I've had this car towed in twice in 6 weeks!  I worked for GM for 4 years and am begining to wonder if I bought a Buick!  Dealer has made necessary repairs but has done little to build my loyalty.  Again, is this a GM dealer?  Lesson learned:  don't buy a failed model that has sat on the lot for over a year after build date (October 2002). 