Pink is the most common color, so if a bee or moth pollinated it first the resulting seeds have high odds of being pink. Nothing against pink, I have some that I bought on purpose that are pink, but if I buy red or yellow it's because I want them to be red or yellow. I had purchased from Snowbelt also in the past, but you're correct, they went out of business. I've purchased off ebay before with plants that are already blooming, and those were fine of course. I lost my Purple Dragon over the winter, and I'd love to find another one.
Your white blossoms are beautiful but I would like to find a yellow flower too. I did get one off eBay but it was grafted and didn't do well. I agree that you must get a blooming plant to be sure of the color.
This plant had a slow start this year and is now filled out and blooming more.