It is a DE1+ PRO, serial #003, which of course means it is version 1.0. It still has the latest firmware and software, as every update Decent puts out is backwards compatible all the way to this machine.
The major hardware revisions have added a touchpad to the top of the group, and modified some other things like headroom in the group. To my knowledge, neither of these have a major impact on the quality of the coffee output.
My machine has about 2500 shots of espresso and steam on it in the 5 years l've owned it, and has just come back from a service at Decent HQ. The manifold sprung a leak, which likely caused a heater failure as well. They replaced the steam and hot water heater, as well as went over all other functions and parts while they had it. From what I understand, they also replaced other parts while they had it, but I don't have a breakdown. I expect it will yield many more years of faithful service.
It also comes with both the catering kit AND the plumbing kit along with the requisite hosing and drain tray it comes with. You'll also notice in the pictures, that it includes a Samsung tablet, as the original died long ago. It will also be shipped in the Decent custom suitcase, inside a Decent box. I'll also throw in a 58.5mm tamper, and the 3 precision baskets I have for it (15, 18, 22).
It's in excellent condition, with the only wear and tear being the portafilter handle has lost a bit of paint, and the grouphead cover has faded from black to kind of a nice bronze color.
I'm looking at getting $2300 for it which is a quite a savings from new, particularly when including the fill kits, as well as the recent service overhaul. I live in Minneapolis so you're welcome to make the trip here and give it a test drive as well!
Full disclosure on my desire to sell. I've been part of the Decent journey since before it started, having been a beta tester for the failed ZPM kickstarter back in... whenever that was. I was way more into coffee then than I am now. I was roasting my own, single dosing, etc., etc. I'm past that now (my Behmor will be for sale soon too!), and I just want a simple, repeatable brew. The Decent can do that in its sleep, but frankly it belongs in the hands of someone who wants to experiment and play around with coffee.