
Hi StaffieElla.
As the others have said there is a huge rescue and over breeding (mostly by the wrong people) of the Stafford, hence why some replies may come across a bit harsh.
Lets get down to basics. The breeding of any bitch/breed should be about more than reproduction, the breed is certainly in no danger of dying out.
Breeding should be about adding/maintaining something useful to the breed in terms of positive traits and breadth of genes, so that the bred is healthy and typical for future generations to enjoy.
To breed well takes a fair bit of knowledge of dogs, and the breed in depth. Then there is the study of the pairs ancestry, you need to know more than just the names on the pedigrees.
You want to know their health, temperament, what good and bad traits they passed on to which bloodlines.
All this cannot happen over night and a person starting out on breeding should have a variety of people that do have this knowledge (to get a balanced view) to fill in the gaps of knowledge the novice breeder has, these are called mentors.
As the original function of the breed was dog fighting. The breed was then taken on purely as a show dog and companion when this was banned. Breeders have been working to tone down the negative traits (unacceptable levels of aggression to other dogs/animals) and turn the breed into purely a companion.
This in good circles is largely successful though one would never rely on same sex Staffords to be left alone together, as the gladiatorial spark once inflamed is still there, and they don't like to back down in a fight.
Now you can probably see where I am going with this, in some circles the exact opposite is the reason for breeding, the old fighting spirit is what is being bred for, for numpties to look hard, sadly sometimes they succeed, and of course the dogs pay the ultimate price.
So first of all, if your serious about getting involved with the legitimate Stafford community you need to see if your bitch is breeding quality.
If she comes from a breeder who showed their dogs and chose their breeding partners with the breed standard in mind she may well be, if not she may well not be, but that doesn't matter at this point.
Join your nearest Staffordshire Bull Terrier breed club and subscribe to publications and annuals that will have breeders advertisements, articles on health and other matters. If you can get historical ones going back several decades all the better as you can then see the development of various breed lines.
Attend some shows to see quality dogs, after a while you will notice that there are varying styles of dogs that all fit broadly into the breed standard. See which ones appeal to you and you will probably see that they have common ancestry.
Look at your bitches pedigree and see which lines (if any known ones) she has. Do not be shy contact the owners of the kennel names you find there and let them know you wish to learn.
Take your bitch to ring craft classes and start entering a few local shows to see WHO she does and hopefully to get some opinions on her quality. If she isn't suitable to breed from no big deal, you Can enjoy learning with her, and use the next couple of years to make friends within the breed, develop an eye for the dogs you admire and get on a waiting list for a quality puppy you can show. Who knows you may then wish to found a canine dynasty of your own.
Realistically you would then be looking to owning up to at least 6 dogs eventually as they are long lived, so you may decide to leave the breeding to others and buy in a new puppy as and when you need, easier to keep numbers down that way.
Good luck.
As for the man offering his dog at stud, decline. Good dogs only need to advertise themselves by the quality fo their offspring dn their conformity to breed standard and such adverts will be in breed publications for other breeders to see.
Barbara and the Grey Curly Tails.