I recently paid £2k for a gundog breed pup. was on the waiting list, willing to wait for another litter, from a different breeder, if not enough born in that litter.
I now would ONLY get pups from breeders who are breeding to continue their line and intend to keep a pup from the litter. Fully health tested. Well socialised and introduced to things like vacuums and washing machines, noises etc. I was on a waiting list for a year for my last pup (now aged 8)
Had to "friend" the breeder on FB (as i did with previous breeder) so she could check out whether I was a suitable home for one of her pups.
I met the pups twice before pick up, was able to express a preference, but didn't know who I would get until pick up as the people wanting a dog for show or working had first pick. I did actually end up with the pup I had liked on my visits.
About 15 years ago I screwed up big time getting a pup - I lost a dog suddenly and a few weeks later a pup became available, via the breed club puppy list, "due to time wasters" and we went for it. They were first time breeders, from their family pet, a pedigree, KC reg etc. They were KC reg breeders, the dog was a sweetheart in and about the house, with the kids, but his temperament was "off". I was lulled into that false sense of security that "golden retrievers have lovely temperaments" and mine always were lovely - and so keen to get another pup that I really didn't do full due diligence. The breeders didn't keep in touch, it was just a commercial transaction for them.
Despite doing everything "right" (that I had done with previous pups) and using trainers, this dog was reactive and had to be muzzled when out. He was a nightmare to walk.
So the next time I was getting a pup I really was willing to wait a year for the right pup from a breeder I could trust. I am still in touch with the breeder from 8 yrs ago, we have a WhatsApp group for the puppy owners for this latest pup, with includes the owners of both parents. We can go to them with questions and issues, support for life.
My pup is a delight, worth every penny of the £2k for me because of the peace of mind that everything had been done right up to the point I bought him home.
You might be lucky and get a fabulous pup from a not so great breeder/home - I've had a few fabulous rescues who didn't have the best start - but do you want to take that risk?