Sunshine Serpents

Has anyone dealt with sunshine serpents?
We saw an ad on KS, for a snake, we really loved it. I contacted sunshine serpents about it, and the response was prompt and polite. I was told the price for the snake as well as shipping. We had an issue with the weather that caused some added expenses. So we had to wait. I told them about it, they seemed understanding and told them to just let them know .
So, I finally let them know that we were ready to get her. And even though it says nothing in the ad about not selling lone females( in fact, the ad doesn't even mention males, the ad is for ONE snake), they won't sell her to us now unless we buy a male as well. They will sell us a male by itself, but not the female that was the one we agreed on earlier.
Anyone dealt with them? What are your thoughts and experiences.
It seems pretty bad to me to agree to sell someone a snake for a particular price, then when it comes time to purchase switch it out with something else or make them buy extra .