The same thing happened to me. When my princess had her first litter she only had one puppy. I did advertise him but like you said, everybody wanted a little 2-3lb full grown. I was only asking enough to cover the vet bills for shots etc. Didn't hurt my feeling any, because i still have him and hes almost 2 yrs old and weighs around 6lb and is so sweet and here to stay. When my princess had her second litter, she had 4, two girls and two boys. We lost two, a girl and a boy. Well, when i advertised them, everybody that was interested only seemed to be interested in the little female and wanted her for breeding. No way was i selling that baby for breeding. It scared me to death, thinking someone would get her and keep her in a crate just for breeding. I kept her until the perfect family came along, but i did sell her and it was so hard to do, but they kept in touch and sent pictures. I turned so many people down that wanted her, i wasn't in it for the money, i just wanted that baby to have a great forever loving home. You just have to wait it out and a loving family will come along and if not, then you just might end up keeping them. I still have the other little boy from the second litter because everybody was looking for that little tiny 2-3lb when full grown. Well, happy to say, i still have my little 5 lb monster lol and hes such a joy.No matter how many puppies i have, if i don't find the perfect loving family, then i will keep them lol....im so picky
All of mine were good and healthy and still are. Good luck with finding the perfect loving family for your puppies.