
Is the pup going to be a pet or shown?
I used to think the pedigree was the be all and end all and the more red[champs]the better but soon learnt that champs can produce awful pups when paired with the wrong dog and non champs can produce excellent examples of the breed.
You need to find a breeder who knows the dogs/lines on the pedigree well and any faults they may have.
Any breed specific health checks or DNA testing has been done, if you check on the KC website under breeding you can check what Beagles need,research each one, you can then ask questions which show you have knowledge of these things and been doing your homework.
Contact breed clubs for list of breeders, I have found out in the past that not all members will be reputable, I found one puppy farmer in the list I was given and she was a member of more than one club and has since become an assured breeder.
Walk away from a breeder who says there are no faults in their lines, no dog is perfect so will have faults, some worse than others admittedly.
Go and watch beagles at dog shows, see what is out there and speak to the exhibitors after they have been in the ring as before they will be concentrating on their dogs, some will give you short shrift, others will chat till the cows come home, you don't want to be dealing with the former.
The puppy find on the KC website will list available pups in each breed and the Assured Breeders will have a star by their name.
Good Luck with your search, let us know how you get on.