It is common practice to sell B-stock and demo units as new, at least in the European market.
I had this happen several times, with a Moog One 16, with a Sequential Pro-3 and with a Rupert Neve MasterBussProcessor.
The retailers check for damages and so on, and if they see nothing, they sell as new. If not, they label the unit as B-stock. This leads to the question "what is new?": The longer you think about that, the harder it becomes to find an answer.
In 2020 I found out that my Moog (which has been sold to me by Thomann Germany as new) has been in use for a few days already. From the OS workspace settings I could even trace that back to the former owner and had a very nice conversation with him. I still was upset and eventually spoke to the European Moog sales representative about it. He simply stated: "The unit actually IS new". Most higher end stuff has already a few dozen hours when leaving the factory due to QC and burn-in tests. So it simply doesn't matter if they have been shipped a few miles more, or have been carefully unpacked and repacked for demoing or evaluation. And higher end gear does not age any when soon. We're not talking about iPhones or underwear, we're talking about studio gear.
Thomann allowed me to return the unit, but it was almost completely error free (despite the software, of course), and this did not happen too often with Moog Ones, to say the least.
Anyways, if you see any traces of the former usage, this would be another case. Then try to get a rebate or return the unit. If not, well, you will have no disadvantage.