Just thought I'd point out that in some counties its illegal to sell pit bulls. I don't know what state you live in or what county but you should look into call up your local law enforcement and ask before you put out signs to sell these puppies. You don't want to end up in trouble. I live in oakland county Michigan and it is illegal here.
I'm also am glad to hear the litter and dam are doing well this far. I would still strongly recomend you read some post-delivery dog books. There is alot to know about raising and rehoming a litter successfully. This book is a great example.
"Breeding A Litter: The Complete Book of Prenatal and Postnatal Care" by Beth J. Finder Harris.
The drawback is it's a bit pricy for the size: 254 pages. But it is a hard cover. It's blue and has a litter of boxers on the front with the dam. I got it at borders 2 years ago for $38.99 However, it's one of the best informative books I've read on dog breeding. Every breeder, or who is thinking about becoming one, should have it
Another good one is this.
"The Chinese Shar-Pei" by Ellen Weathers Debo
I know it's about shar-peis but it provides some great information on breeding, raising puppies, and re-homing the litter. I found this one at the dollar store, of all places. It's a thick hard cover book that's blue with a Shar-pei on the front. It's 256 pages. Despite the fact that I got it at the dollar store it's exactlly VERY informative and well written. Not something you'd exspect to find at a place like that. So if you can't find the first book or need to save some cash buy this one.