Telephone Credit Cards

I recently received 6 telephone cards issued , I think, by China Post (Taiwan, R. o. C ).  I have the impression that these types of item are collectable. If that is correct, what is the proper forum to list  them as available?

Hello 🤖

Without pictures, it will be very difficult for anyone to help you. Could you please post clear pictures of each side of your item?

Please note that this is an automatic message. Feel free to ignore if it is not relevant.

Telephone cards are not in the scope of Numista. You should probably list them on another site.

Have a look on Colnect they have a phonecard section