La_Hoss:
NH quit making 3430's about 2 years ago.  Still might be a few "new" ones out there.  A 2wd one went for 14500-15000, never priced a 4wd unit.  My Father-in-Law had a 1995 2wd 3430.  It was a decent tractor, but a little underpowered for farming and definately needed the 4wd.  The 30 series was replaced by the TN's.  
Jim