Check the listing for details. HP 8743B Opt 018 Reflection-Transmission Test Unit. Condition: Used. Listed at 195.00 USD. Up for your consideration is a Hewlett-Packard model 8743B Opt 018 reflection-transmission test unit. It looks to be in pretty good shape externally, but did not light up when I plugged it in. No other testing was done. I’m not very familiar with this equipment, so the only testing done was to plug it in, turn it on, and see whether it lights up and whether the buttons function properly. Because I’m unable to test it more fully, it’s being sold as "shop art" and is not returnable. Let the photos be your guide. This came from an estate where it was stored in a cool, dry location. If you have any questions about the item or the shipping methods we offer, feel free to call. All shipping is paid by the buyer. We’ve set this up so that eBay calculates the shipping but sometimes it gets it wrong. If the shipping cost seems high, let me know and I’ll look into it. Our number on the West Coast is 541 760-8284.