Just my $0.02...I wouldn't pay that kind of money for a mix. For a purebred yorkie with an impressive pedigree perhaps! Sounds like she's trying to take you for a ride.
Be patient and find a good reputable breeder in your area or here on YT, find out if they show their yorkies - that's usually a good sign. You can definitely find a nice male for under $1500.
to YT - good luck in your search!