I'm not aware of this buyer or these apples, but I would be wary of Spitzenburg, because it list no disease resistance.
I agree with Lauribob. We live the very wet PNW, this grower is in a warmer drier climate. What do they know about disease resistance for up here. There are some very good growers of fruit trees in both Washington and Oregon, so much so that the garden centre I use to work imported them into Victoria and Vancouver, BC. If you want antique heirloom there are those growers in your region as well.
