Your morkie is a cutey. Here is a pic of our morkie.
We bought a "morkie" from OKC, (not the OP) 3/4 yorkie and 1/4 maltese, but we paid $300.
I think the asking price is your business. But I also don't see anything wrong with people raising their eyebrows at the $1500 price you asked for. Normally, in OK, the yorkie prices are much cheaper, even for the registered pure-breds.
Glad he has decided to keep you though!
But we are very happy with our MolLeigh Diane. She is a little tomboy, and I believe the alpha of her litter. She thinks she is alpha over our AKC GSD, who is the same age and weighs 90 lbs.