Maybe I'll be lucky enough to find one in a few years... but $200 for what appears to be an internationally shipped plant, no thanks.
The company is not in Virginia, best I could find. If they were I'd try to go for a visit.
Edit... I reached out to a few folks, including an etsy seller and was informed of the following... hopefully ChangYun Nursery can confirm this to be correct?
"Hello! While both the Crispy Kumquat (脆皮金桔) and the Crispy Honey Kumquat (脆蜜金桔) come from Guangxi, they are actually two different varieties."
"Crispy Kumquat
Appearance: Round or oval in shape, with smooth skin that is thin and crispy, and tender flesh. The crisp skin is the reason it's called "Crispy Kumquat."
Taste: The skin is crisp, and the flesh is tender with no bitterness or sourness, offering a pure sweetness. It has almost no seeds or is seedless, with a sweetness level of 20+.
Crispy Honey Kumquat (also known as Crispy Honey Kumquat King)
Appearance: Shaped like a pomelo or a small light bulb, with smooth skin that is thin and soft.
Taste: The skin is soft, with a high juice content. The flesh is fragrant and sweet, almost seedless, and has an incredibly high sweetness level of 23+."