We are selling our very lightly used TTB approved Anton Paar DMA 4501 density meter and Alcolyzer 3001.  We bought about 18 months ago and have conducted a total of 275 measurements on it.  The unit is in excellent (almost brand new) condition.  It lived in a positively pressurized HEPA filtered lab maintained at 68 degrees.  We bought for a canned cocktail project we are no longer going forward with.  New price is 55k before tax for the combo.  Unit just serviced a few weeks ago by AP and passed with flying colors.