Scroll down to compare the ESP32 Development Board prices at different stores.
Aliexpress.com
Shrsl.com
Ebay.com
$15.99
1 new
from $15.99
as of November 4, 2018 10:55 am
Amazon.com
£14.99
1 new
from £14.99
as of November 4, 2018 10:55 am