Wanted to buy a e bike under 800 euros

Hi i am new to germany and wanted to ask which marke is the best. Some bikes i have found –

https://www.lidl.de/p/prophete-e-bike-mountainbike-650b-graveler-big-fast-mtb-27-5-zoll/p100372959

https://fischer-bike.com/de-de/fischer-e-mountainbike-montis-em-1724-schwarz-rh-51-cm-29-zoll-418-wh

https://www.kaufland.de/product/469554753/?utm_source=kaufland_app&utm_medium=social_sharing&utm_campaign=IOS

Eleglide M1 Plus E-Bike Women's Men's Electric Mountain Bike 27.5/29 Inch Electric Bicycle with 36 V 12.5 Ah Removable Battery, EU-Compliant E-Bicycle 21 Gears 250 W Rear Wheel Motor, LED-Light https://amzn.eu/d/

If find the best in this please recommend it to me as i am not able to decide