These Agilent HP 81533B units are in decent to good condition. They have been NIST calibrated in May of 2016  with a 2year NIST calibration certification. We have 2 in stock with NIST calibration certification so the unit you receive may not be the one in the photo but they are both in comparable condition and were both NIST calibrated at the same time. STARTFROOGALLERY Copyright ©2009-2010 Frooition Ltd. All rights reserved. The following HTML, JavaScript and CSS Styling may not be used or reproduced in whole or in part, without the prior permission of Frooition. All eBay graphics not owned by eBay or eBay associations are the property of the eBay account owner and may not be used without their written authorisation. Any person or group of persons found to be in breach of this notice may face legal action.