I do not know how much you have already gotten involved with getting the baby, and no idea about the price of a mixed breed puppy...but...it sure is a cute puppy! Maybe someone else can give you an idea what to expect, other than making sure it's a legitimate 'offer'...still, this is at least a tri-mix...sounds like more than one 'oopsie' has occurred...might be interesting the reasons why...or maybe a wee bit of a 'profit venture' than a 'breeder' endeavor. So as was already said, might want to be careful. That much mixing sounds more like it 'should be' a 'give-away' puppy...which might be an excellent playmate for Buddy. If you decide to haggle, maybe you might offer to give, at no cost to you, the baby a good loving home if they will get their other dogs spayed and neutered.