Interesting Cross Breed on Craigslist

I would like for breeders to try and produce a very healthy dog. Who cares what it would look like, or how big it got, how much it sheds, or how much it drools? I would so enjoy a loving, loyal companion, that would enjoy a long life. It's so hard to watch them suffer from any ailment, but even worse, one that could have been prevented with careful breeding.