Hoe much would you pay for a black lab mix puppy?

My black lab mix is pregnant and the father is a purebred black lab. My vet suggested to have my Clementine have a litter before she gets spayed because apparently it is better for her health and can improve her hyperactivity.

So I want to sell the puppies because I definitely can not keep them all, but I am not sure how much to ask. I don't want to be a jerk and charge too much but I don't want to give them away for free either. I am afraid if I go to low or don't charge I might have people who may not be the best pet owners get a puppy because they are cheap or free. I feel that people who genuinely want a dog to love and take care of would certainly pay a fair price. I am definitely going to have their first shots done and have them de-wormed first. My Clementine was a rescue, so I paid the adoption fee for her but I am just not sure what would be a fair price for the puppies. less