My concern wouldn't be the warranty, when the price is that good there is room to pay for repairs if there is a need for it.
However if the units are stolen, then it is a different game altogether. I once had all my gear stolen from my house, some of it brand new. never recovered anything, but I made sure to place a curse on all of it. Fins would only swim to the bottom, 1st stages would never adjust correctly, masks would never seal to any face, zippers would froze open, and so on. I like to think that over the years, some of the "undeserving" accidents I've read about was direct result of that.
So the last thing I would ever want to do is to buy hot gear, regardless of how good of a deal it may be.