well, OFA is not at all common in the breed right now. It's not something that is make or break, or if it is...pick another breed lol. I do it and bunches of others do...but on the whole it's not done like in GSD's or other breeds as a matter of course.
Beagles JUST RECENTLY became eligible for CHIC numbers with the requirement of eye, hip and either heart or thyroid certifications being the criterium. Only a relative few have CHIC #'s right now.
The breed is moving towards it more but it is difficult because they are a small breed with many folks who keep a good number of hounds and haven't seen enough issues to make them want to shell out the $$ to OFA/CERF/etc.
Now aside from that....I think the kennel is a good one, with nice hounds, with nice temperaments, and I'd have no problems buying a hound from them myself so long as I test and such myself before adding it as a breeding dog.
Have him ensure the contract is acceptable to him and let him know the kinds of things it should address. That always helps!