I am not sure which version these are, but I don't expect them to be from the initial production runs, as many had bought and were raving about these by the time I got these. I think I was also wait-listed for a while before mine were ready and shipped to me. I would estimate these to be somewhere in the middle, maybe even the tail end of the production runs.
That said, the amp did fail on one, so assume the worst when it comes to these amps is all I can say! The amp on the other one has worked just fine for quite some time. These were deployed in a dedicated HT room about 25x18, and these were awesome (while it all lasted - the home as well the amp!

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I got a question over PM whether the price is for one unit or both units.
The price is for a total of two units purchased together, plus the extra driver. The price does not include shipping. Shipping by freight only, and is to be paid by the buyer. I can ship by FedEx/UPS ground if they will accept it as ground shipment (although I doubt if they will, and even if they do it will be significantly more expensive than freight).
Also note that these come with original packaging, and are currently packaged and stored in my garage since the move. Unfortunately, I didn't get a chance to mark the failed one on the box during the move, so now it is difficult to identify the failed one without going through the huge hassle of unpacking at least one and testing it. These are huge, extremely heavy, and unpacking would be a pain. So I prefer to sell them together with all the known issues declared.
Shipping insurance is required for at least the transaction value, if not an equivalent new replacement value.