I respectfully disagree with you about reputable breeders and them not knowing their for-sale stock. I have dealt with three breeders who fall into your category of breeding 50+ snakes a year and having in excess of 20 clutches and I can assure you that the breeders TAKE THE TIME to know what they are selling. My '06 spider came from Adam at 8Ball and he absolutely knew about the spider he was selling me.
Please, don't let numbers of snakes cloud your vision for the passion that some breeders have for turning out totally top-notch reptiles for other breeders and hobbyists. The breeders I deal with know their stock and handle their snakes.
Okay, coming off my soapbox now......!