Him being gelded may have been a term of the sale... also, since he is Poco Bueno bred, he could be a carrier of HERDA, and if he was tested positive to be a carrier (he will NOT contract the disease himself) he could pass it on to his get, and if bred to another carrier, the foal could become afflicted and would have to be put down. It may be a recent thing, a foal may have shown to be afflicted, which would mean he IS a carrier.
Maybe not, maybe the owners had another stallion and couldn't manage him too, or didn't want the hassel. Kevin, a close friend of mine was planning to show and use my gelding, Spur, as a stud, but cut him because he didn't have the money to show him and prove him as a stallion, and sold him as a gelding to us, and we haven't had the papers transferred yet, so his stallion status hasn't been changed yet.
They are BOTH beautiful, however, I think I'm a little more drawn to the mare... I think because in the picture, her face looks like it may gray out, and I am a sucker for grays!