this a great site to look for litters on. a lot of the best breeders in the country post on here, and by far the best training community out there.
http://www.retrievertraining.net/forums/forumdisplay.php?f=31
just make sure whoever you go with, the sire and dam have all of the proper health clearances, pup comes with a health guarantee, references. And do your research on the blood lines, so you can get what you’re looking for in a dog.
I would stay away from any “backyard breeders” or craigslist/newspaper type listings.
Yes, the cost of a well bred dog can be expensive, but it is the least expensive portion that dog will ever cost you, so don’t skimp on it. get a healthy dog, from proven, healthy lines. You won’t regret it down the road.
If you have any specific questions, let me know, and i’ll try to help.
StuWest on this forum is a great resource too, he has been breeding and training dogs for quite a while now.
I had to drive all the way to Huron, SD for this guy, and he has been worth every penny.

and remember, it doesn’t matter how much you spend on a dog, if you don’t do the proper training, it will never amount to the field dog you hope for. They will never “learn it on their own”…