Otis OMT black brief case for sale. Only the unit. 1000$ US

What's your plan when their legal folks turn up asking why you're trying to sell their stolen property?

Not stolen. Left behind by the big O. They left numerous units behind

Does "left behind" by a mechanic somehow constitute a transfer of ownership to you? There are folks associated with Big O's legal team who regularly check forums like this. I don't work for them (in case you are wondering), but I've heard the stories over the years. The OMTs were fiercely protected by legal means and court cases. Some of the early OMTs were booby-trapped to erase the program memories inside them in case they were tampered with. They were paranoid about letting them get into competitors' hands.

Here's one case where they prevailed.

https://casetext.com/case/otis-elevator-v-intelligent-systems-no-cv89-0700549s-jul

Seems times have changed. While I'm sure Otis still would use their legal for something worthwhile in a second, they once fiercely protected the OMTs but nowadays a 7 year old using a phone can buy an Otis blue tool and have it delivered to their front door in two days for the cost of taking your wife to a steak dinner....