4 Terrier Chihuahua Mix puppies for sale

I have four puppies available for sale: two females and two males, all of them are caring terrier mixes. Unfortunately, their mom is unable to feed them due to a health issue, so they will need to be fed with formula from a bottle every six hours. I'm asking for $500 to help cover the vet bills for their mom and to have her spayed. Please, no trades or negotiations.