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Prices for a Cavalier King Charles spaniel run anywhere from $1,800 to $3,500.
Top attributes: Great family dogs that are easy to train. And, yes, this was the kind of dog owned by Charlotte York of HBO’s “Sex and the City.”
Downsides: This breed may be prone to health problems ranging from kneecap dislocation to heart ailments.
Average lifespan: 9 to 14 years