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 August 22, 2019 10:00 am
Amazon.com
£13.99
1 new
from £13.99
as of August 22, 2019 10:00 am