I don't have a problem with placing financial value on an animal (clearly, since as I said I do it routinely as part of my job), but I would agree with Jax's statement. I don't think a family mutt has less inherent value than a GSD with impeccable bloodlines and a Schutzhund title. That doesn't mean the GSD's owner is wrong to place a price on the value of their dog, but the mutt is still worth something beyond money, you know? It's two very different ways of assessing value.
I don't know if this is how Jax meant it, but I interpreted that statement to just mean that every animal deserves a good life, regardless of its price tag. The financial value of a dog is something that's kind of made up anyway--look at pit bulls bred for fighting, for example (I can think of many more in the horse industry--the entire US Arabian industry is a cautionary tale about this--but I'm trying to stay away from the horse analogies
As far as desexing a dog before rehoming it, I have a hard time criticizing people for that too. Back when I first got my GSD and was trying to rehome him (I found him as a stray and didn't want another dog at the time, but he grew on me after a couple of months
), I interviewed several people who seemed great at first but who I eventually discovered intended to breed him--despite the fact that, being a stray, he has no papers, and that GSD experts even disagree on whether he's actually even purebred! But he looks purebred for the most part (in person, most GSD people think he is, but his photographs incite more disagreement), and they didn't care. Some of these people were even involved in dog sports and like I said, seemed like perfect homes.
Now, Hector clearly wasn't a proven working or sporting dog at that point, but the experience would make me very leery about rehoming an intact animal unless I knew the person they were going to very well. I suspect some of it has to do with the amount of contacts the individual has in the dog world too...I personally didn't have any and still have relatively few, so it's harder for me to reliably vet potential homes. A more experienced and involved owner (someone who is actively involved with sporting, working or breed organizations, I mean) and knows a lot of people might feel a lot more confident rehoming an intact dog.
edit: I do agree with your above post, Liesje. I guess my whole point is that it is very situational and I don't really think anyone should be judged too harshly for their decision about this kind of thing, as long as they're being as responsible as they can. Like I said previously, the only time I really judge is when someone leaves a dog intact and doesn't manage it responsibly, or if they knowingly sold a dog to a puppy mill, something like that.