German 'coins' (tokens) advice please

[terry.h]

Can anyone please tell me anything about these coins (tokens). They are shown front and back.
They are apparently called EXONUMIA coins what ever EXONUMIA is. I omly want to sell them but I need to know what they are before I can sell them.
Thanks in advance,
Terry

[Gerdan]

1) https://www.ma-shops.de/sesambestcoi...m.php?id=30904

2) https://www.ebay.ie/itm/1934-WW2-3rd...-/254335674018

3) https://www.ma-shops.com/fruehwald/i...ng=en&curr=EUR

4) https://www.weitze.net/militaria/32/...l__269032.html

Gerdan