Jetboard Limited opened a test center in Barcelona where you can test, rent and buy different electric and petrol powered surfboards.
A STARTER package for one hour is between 50 and 150 EUR depending on the board. They offer Mako, Jetsurf, EasySurf, Supjet, Onean, Waterwolf, Lampuga and Radinn.
Fo 1,000 EUR 2 people can test all the board all day long and get some goodies.
https://www.jetboardbarcelona.com/lessons
And of course you can buy the boards in their shop: