Humblepie
500+ Head-Fier
Ok... so the thing is, which i'm guessing is actually happening, is that in 3 days aliexpress is having its "brand day" sale. If you notice almost all products have marked up their prices because on sale day they want to show it as if it has less price (the sale price is also listed and apparently it is same as the price previously listed). So my guess is that the seller has hiked the price expecting some people to purchase it the higher price. So he has cancelled your order and is waiting for someone to pick it up at the new price.
Funny thing was that I ordered about a dozen other products, from different sellers, after that one purchase over the course of the week following that purchase for the ISK MDH8500. No one else cancelled. I did notice that aliexpress is having a "strike it gold" sale of some sort. Not sure what it is all about because the sale seems like it will be random?