Well, and here are the results: 7 scales with the probe, so normally a male (although it should be 8-10, but female is only 3-4). I haven't looked this animal in real life ( and it was not me who probed) and don't find the pictures clear enough to say that it's underfeed. It's typically that the male's are very slender.
I'll ask for another picture of the underside, to make sure. It's again a very long drive, so I want to be sure to buy a healthy snake.
edit: didn't say what I thaught
. From the shape of the body, I was also thinking male.