All the prices I have seen posted here do not seem out of line for first class animals off the farm, and actually are quite cheap when you consider all the labor that goes into making a weaned bottle goat.
But I love the sale barns...can't help myself. Locally, we have a bunch of show goat breeders who get high dollar for their purebred, registered stock off the farm. And that's great, and more power to them. Behind the scenes, they also feed the sale barns with their "undesireable" animals. The 4-Hers also sale barn animals. Which I pick up at auction with no papers for $35-40 average for a 6-10 month old, or $75-80 for 2 years old and up.
These "undesireable" animals then go to my meat farm, where if I am very careful in my conformation selection, they'll make me some great kids to sell. I currently even have a 1/2 Boer billy I bought from the sale barn at about 10 months old for $75. I'm about a week or two away from his first kids.
Sometimes people get mad at me for saying I do this, like it threatens their business or something. But those auction goats would all go to meat if I hadn't bought them. On the days I am not there, they still arrive and are sold. So I am helping the goat breeders by putting some of my money in their pockets for goats they wouldn't sell out the front door.
Here's an $80 undesireable sale barn Boer nanny.