The descriptor seem off for the plant as well as the photos.
My guess is an common Orinoco/burro type plant.
The web page suggests a Basjoo type plant but the photos do not match the characteristics of a basjoo plant..
The cost seems in line for a common plant also...
Either way you have a great plant to grow and possibly get some fruit from.
This is only a guess....
https://www.lamaisondubananier.com/b...-fruitier.html