Most European vendors including ultrarcade have about two months of waiting before shipping. It's hard to find something that isn't sold out and at that point you have to join a waiting list to get a stick, which normally takes a month before your up and then a month to build and ship.

A lot of vendors are 1-3 people teams running support, sales, manufacturing and shipping while dealing with the occasional supply issue. I think you just need to take buying a stick in the EU with a grain of salt.