I have several of these for sale. I only taken photos of 1. These photos are a representation of the condition of these units. They are not mint, but operate mint. These have been fully tested and work as they should. We tested the wattage.....these exceed 1800 watts continuous. These did exceed 2000 watts surge for 5 seconds. These do in fact still have a very clean sine wave on the oscilloscope.  I'm confident in these. You will not regret purchasing these. You will get whatever is pulled from the shelf. You may or may not get the one in the photo. Thanks for looking!