
For a pup from a good line and KC registered you are probably looking at around £400-£500 although I would personally consider £500 to be over priced but they are advertised for that .
Try contacting Southern Counties SBT Society - Dave Holman 0208 2899089 for details of any litters due . SBT Clubs are usually able to put you in touch with someone or give out some info.
Have you looked at any litters advertised on here ?
Another good Staffy site ( who also has Breeders listed) is Staffords.Co.Uk
Goodluck
Lel