FYI: Cheap mecanum wheel robots on aliexpress

https://www.raspberrypi.org/forums/viewtopic.php?f=37&t=315880#p1889592

My friend constantly makes the same mistakes. Several times I tried to order a normal high-quality robot for myself. But he constantly had the same problems. Then they sent the wrong thing,then the money was not returned, etc. This time I advised him to use Alitools and check the level of confidence in the seller and carefully study the dynamics of prices for goods.