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 May 5, 2019 1:15 pm
Amazon.com
£15.99
1 new
from £15.99
as of May 5, 2019 1:15 pm