Ten Tec doesn't provide photos or description of condition of their used equipment. I can't recommend buying used gear under those conditions.
I have bought used/demo equipment from Ten-Tec several times over the years and the "demo" equipment has always been 100% pristine original with every original accessory and manual in complete original packaging, in a condition that I have never ever been able to describe as anything but indistinguishable from "new".
The "used" stuff is really, truly top notch "like new" stuff. And they do have photos of "used" equipment on their site.
I will heartily recommend buying demo and used equipment from Ten-Tec. I encourage you to call and talk to them if you have any concerns at all about any item or the process. Sales, shipment, and customer care of their used/demo equipment is done with all the care that they give to buyers of "new" equipment. I know this last part because of a UPS shipment problem that happened on one of my used/demo purchases, and Ten-Tec went way above and beyond in taking care of that shipping issue. It was their handling of the UPS shipment problem, that lets me be so confident in saying that they will take care of the buyer.