According to Wikipedia, the flag of a sovereign country containing more colours is that one of Belize: more than 10.
Because of this reason, I think it should be the most expensive.
The complete list is in the following link:
https://en.wikipedia.org/wiki/List_of_flags_by_number_of_colors
And here is the flag of Belize:

Last edited by Pillandia (September 20, 2019 5:19 am)

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lieuwe wrote:

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Regardless of the fact that it is obvious that, in an auction, the white flag of the last Fort Alamo defenders is worth more than the most complicated flag in the world, the thread starter had asked

CFischer wrote:

...have any ideas on the most expensive flag to make?

I have expressed an opinion on Belize because it has more than 10 different colours and because the image is very complicated and requires custom work, in the realization.

 

lieuwe wrote:

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Pillandia wrote:

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lieuwe wrote:

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Your conversation made me to remember when, 5 years ago, I was attracted by a big and beautiful Tibetan flag (the same as my avatar's) in a souvenir shop, which is forbidden in China.
I was going to buy it, but I gave up at the last moment, because while I was examining it I discovered a small label with the words 'Made in China'.

lieuwe wrote:

Ha ha and they know how to make numbers 

True indeed