Scroll down to compare the ESP32 Development Board prices at different stores.
Banggood.com
£8.14
in stock
1 used from £8.14
as of March 4, 2020 1:29 pm
Amazon.co.uk
Ebay.com
$15.99
in stock
1 new
from $15.99
as of March 4, 2020 1:29 pm
Aliexpress.com