Not sure what's going on with pricing on GoodEreader. The price has been lowered from 350$ to 329$. Also, the html file name of the goodEreader web page is "boyue-p10-is-a-10-3-inch-e-reader-that-costs-279"! Some greedy people there
Hopefully, when the P10 will be available on AliExpress, the price will be even lower...