Where can I buy the consoles mentioned in the text?

I would like to buy the following consoles, but hardly find them anywhere:

1.Nintendo 64

2.Gamecube

3.Gameboy Advance

4. New Nintendo 3Ds Xl

5.Nintendo Switch

6.WiiU

I know some of the consoles are very easy to find, but please send me a link for the respective consoles.

The console should be in new condition (i.e. In good condition) it may have been used.

In the Nintendo shop

Konsolenkost.de

The console should be in a new condition (that is, it should never have been used).

This becomes practically impossible for the N64, GameCube and GBA. You can't expect to be able to buy a 20+ year old console new. You can only find original packaged consoles at collectors and hardly any of them will sell your treasures.

Sry, meant in the sense of never used that it should be in good condition.

It can of course be used.